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Syllabus of B.Tech in CSE and B.Tech in IT is similar up to 80-90% in various universities. Courses on Computer languages, data structure, databases, and networking, etc., are common. B.Tech in IT programme is primarily focused on in the field of computer applications such as mobile computing, ERP, SCM, etc. Whereas, B.Tech in CSE programme primarily focuses on subjects with more mathematical and theoretical foundations of computing rather than emphasising specific technologies. It covers all emerging topic like Artificial Intelligence, BIDW, etc. B.Tech in CSE graduates can work both as systems and apps programmer, whereas, B.Tech in IT graduates are trained only as the application programmers.
Market acceptance of both the degrees is almost similar in app development and maintenance companies. However, IT product companies prefer B.Tech in CSE graduates. In any engineering entrance examination seats of B.Tech in CSE are filled fast.

It is very tough to get a good government college with your rank, I would suggest you to reappear for the exams and get a good score.
College you may get are:
Geethanjali College of Engineering & Technology,
Arjun College of Technology & Sciences,
AV College of Arts Science and Commerce,
AVR & SVR Engineering College,
Sri Sivani College of Engineering,
Chebrolu Engineering College Institute of Computer Electronics & Management,
Indur Institute of Engineering & Technology,
Sharada PG Institute of Research & Technological Sciences,
Royal School of Information & Management Sciences,
Little Flower PG College,
RCR Institute of Management & Technology
Sri Indu Institute of Management

Below are stated the top colleges for BBA in Delhi:
IILM
3, Lodhi Institutional Area, Lodhi Road, New Delhi 110003
New Delhi Institute Of Management Studies (NDIMS)60 & 50 (B&C), Behind Batra Hospital, Tughlakabad Institutional Area, New Delhi-110062
NBA Group of Institutions (NBA)
NBA, Jain Studios Campus, Scindia Villa, Sarojini Nagar, Ring Road, New Delhi 110023, India
Institute of Information Technology & Management (IITM)D-29-A, Institutional Area, Janakpuri, New Delhi-110058
Guru Nanak Institute of Management
Road No : 75, West Punjabi Bagh, New Delhi 110026
Skyline Business School
Hauz Khas Enclave, New Delhi 110 016, India
Jagan Institute of Management Studies (JIMS)
34, Ring Road, Lajpat Nagar IV New Delhi 110024
FOSTIIMA Business School
75-76, Amrit Nagar, South Extension Part-1, New Delhi-110003
Delhi Institute of Technology and Management (DITM)
3, Kapil Vihar, Pitampura, Opp. Metro Piller No. -347, Delhi-110088.