I am a second year mbbs student having a good knowledge of biology

I think so because his way of teaching is very simple and easy to understand. He has got some good communication skills and deep knowledge.

I think Rishi is an amazing teacher because he personally prepared me for my 10th boards for biology and I was able to get 90+ because of him.
I think what makes his teaching idiosyncratic is that he explains from level 0 for everyone's basic understanding.
Anybody would be fortunate to have him as a mentor.
I wish him all the best.