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Hello dear,
Here, two of the best choice for you as B.Tech or B.Sc.
B.Tech degree in Biotechnology encompasses both the biological sciences as well as the engineering aspect of Biotechnology. The B.Tech curriculum will cover life sciences subjects such as Microbiology, Molecular Biology, Genetics, Cell Biology, etc. and engineering subjects like Bioprocess Engineering, Biochemical Engineering, Thermodynamics, Mass Transfer etc.
A B.Sc degree on the other hand focuses more on the biological sciences aspect of Biotechnology. Yes, there will be a few subjects (1 or 2) related to industrial processes but the main emphasis will be on R&D in biological sciences fields such as Biochemistry, Plant and Animal Biotechnology, Microbiology, Molecular Biology and Microbial Genetics, to name a few.
There is no such thing as B.Tech being better than BSc or vice versa. Students must choose a course that aligns with their long term goals. Do you want to pursue a research career in areas such as Stem Cells, Genetic Engineering, Plant Biotechnology, Molecular Biology etc.? If yes, choose BSc/MSc Biotechnology or BSc Biotechnology and MSc in any specialized field of Biotechnology. You can later on pursue your PhD if interested.
If you want to keep your options open, then go for B.Tech Biotechnology. Many B.Tech students who do not find jobs in biotech sector shift to software, management etc. So, this is an added bonus for biotech students and this kind of transition will be tougher with a BSc and MSc degree in Biotechnology.
Scope of Biotechnology for B.Tech students:
Any student who is contemplating on pursuing a career in Biotechnology must be aware that this field is still developing in India. Therefore, the number of job openings and pay packages are both very low when compared with IT and CS fields.
After a B.Tech degree, students can find jobs in pharmaceutical companies, research labs and institutions in India. However, most Indian students tend to go abroad to pursue their masters or doctorate studies in Biotechnology and allied fields. Some students also shift to MBA and enter the world of business, finance and banking as their engineering background gives them the required quantitative skills to excel in these sectors.

It depends on the stream that you will be pursuing in. Marketing and Finance are extremely good in terms of ROI and placements. Market is extremely unstable, so we cannot be too certain about the placements based on the average placements. Things may change, first be sure about what stream you want to switch into. Being from an IT industry with 2 years of experience, I found my work extremely monotonous and not challenging enough. So, I decided to pursue Management - HR division. I needed a complete career change. If you think it is worth it to spend INR 15 Lacs and invest 2 years of your time here, go for it. Else, you can always wait for another 2 years and go for Executive MBA. Let me know, if you need more input on this.