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Depends on below criteria:
Eligibility:
M.Tech (CSE)
Both GATE and Non GATE candidates are eligible to apply for admission with B.Tech/BE or MCA/M.Sc in CS/IT (& its allied areas) with a CGPA of at least 7.00 out of 10 or 65% marks. M.Tech (ECE)
Both GATE and Non GATE candidates are eligible to apply for admission with B.Tech/BE in ECE/EE (& its allied areas) or M.Sc. In Electronics (for ECE) with a CGPA of at least 7.00 out of 10 or 65% marks. Relaxation
IIIT-Delhi provides relaxation to SC, ST, OBC, PwD and CW category candidates. Specifically, candidates under these categories must have a CGPA of at least 6.0 out of 10 or 60% in their qualifying degree. Applicants who do not satisfy the above criteria will not be considered for admission
Note: Candidates in the final year of their programs and who expect to complete all their qualifying degree requirements before the date of registration are also eligible to apply for admissions. For shortlisting and selection purposes, their performance until the preceding semester (preceding year if their programs are year based) would be considered but their admission would be provisional, subject to their meeting the minimum eligibility criteria after their final qualifying examination results are announced.

Yes, why not.
End of the day, interest in specific field matters. ECE students understand the hardware which becomes a + point for a cyber background. Start by learning the basics of networks and network security. Certifications like CCNA Security, Network + will help you to understand the basics. Once you are done with this then learn scripting basics if interested and get hands-on with Linux/Windows OS as much as you can. With this knowledge you will be able to study and get certified as a CEH (Certified Ethical Hacker). Cyber Security is a very vast term and there are so many avenues within that you can master and make it your expertise.

The eligibility criteria of M.A. in Economics (Specialization in World Economy) of JNU is given below.
Eligibility criteria :
(i) Bachelors degree (with 50% marks in aggregate) in the following subjects: Economics (Hons.) with
Mathematics as a subsidiary subject; or Mathematics (Hons.) with Economics as a subsidiary subject; or
Statistics (Hons.) with Economics and Mathematics as subsidiary subjects.
(ii) Any other Bachelors degree (with 60% marks in aggregate) with courses in Microeconomics,
Macroeconomics, Mathematical Economics and Statistics.
So from above Bachelor degree in Economics (Hons.) with Mathematics as a subsidiary subject is needed for M.A. in Economics (Specialization in World Economy), hence you are not eligible for the asked course.

Jaipur National University is the best biomedical Science College in India. B.Sc (Hons.) Biotechnology is a three-year degree programme. In the first two semesters, the focus is on the core subjects of biotechnology to ensure a good grounding in the fundamental concepts. Specialization is offered in the second and third year. The course contents cover all aspects of the applied and core biotechnology including molecular biology, genetic engineering, plant and animal tissue culture, bioprocess technology, advanced microbial technology, intellectual property rights and patents, industry relations and entrepreneurship, etc. Duration: 3 Years.
Eligibility: 10+2 Science (Biology/ Maths/ Agriculture/ Biotech or Equivalent)
Selection Procedure: Merit and Interview
Visit: https://www.jnujaipur.ac.in.

MBA course of NSB Academy is recognized by Bangalore University (UGC Recognised, NAAC 'A' Accredited). while Certificate in Management Practice (CMP), A bundle of industry - compliant advanced certification program. The eligibility criteria and admission details of MBA+CMP programs are given below.
Eligibility criteria : A degree from a recognized university (Applicants waiting for their final year results may also apply. However, such students will be given provisional admission).
Admission criteria : A student applying to NSB for MBA / PGDM must have a valid CAT/GMAT/XAT/MAT/ ATMA/CMAT/KMAT percentile which is All India Aptitude / entrance test (approved by and directed by ministry of HRD, Govt. Of India).
Interview: Personal/Telephonic : While admitting candidates, the selection committee considers academic performance and test score, performance in the interview, prior work experience, level of maturity and motivation, ability and willingness to make a commitment to the graduate study in business, extracurricular achievements, honors and awards.
Application Procedure:
Step 1: Send paper based application form OR Apply online (https://nsb.edu.in/applyonline.php)
Step 2: Once your completed application is submitted, our admission officers will get in touch with you within three working days to schedule interview.
Total course fee : Rs 590000
Hostel fee : Rs. 1,08,000/- per year (Including Food and Accommodation)
Admission fee : Rs 30000