Dear Harshil,

The salary for b.tech biotech graduate variates significantly depending upon the college the person pursued his/her course, the skills of that person, vacancies, etc. The average annual salary by the leading biotech companies ranges from Rs.2,29,238 to Rs.8,28,746 per year. This states the average salary so the highest and lowest will be totally different.  The link given below states the stats I shared in this answer.

I hope this answer helps.

https://www.biotecnika.org/2018/07/biotech-salary-analysis-2018-city-wise-biotech-jobs-salary/