Hello Sri Nivas,
It is mandatory to study mathematics at 10+2 if you want to apply for biothech coirse in the sastra University.
The usiversity majorly asks for PCM in 10+2 .
Most people get confuse by biology but it is not so. You need to have Maths as your main saubject in 10+2 in order to study this course.
Good luck.
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