Hello Jayanta,
The duration of BTech Biotechnology course is 4 years.You can pursue this course in leading institutes like IIT Bombay, VIT, SRM and BITS pilani.This course has a good scope in he near future and so you can very go for it.
For more details regarding this course you may refer to the links below
https://www.careers360.com/biotechnology-engineering-course
https://university.careers360.com/colleges/list-of-biotechnology-universities-in-india
All the best!!!
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