Science

If you are not able to appear in engineering exams, then many forms are available in the market to fill up & give the entrance exams like NDA, Merchant Navy.
There are some engineering colleges are in India that gives the facility of direct admission. You can also choice this option.

https://www.shiksha.com/b-tech/resources/jee-mains-cut-off-predictor
Please follow this link to get detailed information. All the best.

Please check the link below:
Here is the list of top KCET colleges:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-india-accepting-kcet/44-2-0-0-6611&ved=0ahUKEwjBr_b5sbXUAhWFOI8KHWpjCiMQFggrMAE&usg=AFQjCNH-dOzXGOLX0wgJa1iREkA90VdkNQ&sig2=tE3Ynk4P9UOUTtte9bCbLQ

Hello.
You won't get admission in engineering colleges.
Maybe in lpu you may get.
My advice is that you better choose commerce colleges for graduation programs.
Thank you.
All the best for your future.

The field of Agriculture has more scope than the field of Physiotherapy.
The future of Agriculture specially with a new Green Revolution around the corner is many folds than that of Physiotherapy.
So, it is best for you to choose the field of Agriculture.

Don't go for engineering, do B.Sc or B.Com graduation and go for civil services, that will be best for you. Everybody is trying to get admission for engineering.

For B.Tech biotechnology, you can take admission in Institute Of Information Technology, Punjab University. It gives admission on the basis of JEE main rank through JAC, Chandigarh counselling.