Presidency University, Bangalore

Find below the link to Shiksha's best college predictor for COMEDK which will help you know about various colleges and streams that you may have a chance to fit in this year: https://www.shiksha.com/b-tech/resources/comedk-college-predictor.
Feel free to raise more queries. Wishing you all the best.

Of course, PUBDET is the entrance exam for admission in B.Sc in Life science. This exam takes place at the end of the April every year and the application time frame is early February before +2 Board exams

If you want to pursue petroleum engineering then I would suggest applying in UPES, Dehradun. It is one of the best college in India and it also has better placements.

Trust me when I say you'll get in very easily. Although non-exam merit seats are reportedly 20% of total seats, with the University accepting more than 200 students per branch (according to recent trends) that makes it a total of 40 seats for the non-exam category and of course, if there are 40 students ahead of you, and you're the 41st, you will still get in, simply because one more student means more money and it seems this college wants only that.