I think IIT Delhi has a requirement of minimum 80 marks (at least it was the case, when I was there) to get an A (perfect 10). So, securing the highest marks may not be enough. But, some teachers relax the requirement of minimum 80 marks to give an A.
I like to blog about various topics ranging from education in IITs to social issues in India and US. All opinions and views presented here are my own and not of my employer.