Answerfor: Where would you rank this person in potential to undertake...

Where would you rank this person in potential to undertake the proposed degree in comparison with all the graduates you have known in this discipline?

A). In the top 2% B). 5% C). 10% D). 25% E). 50% F). In bottom 50%

I think the best is E). 50% plese confirm that I am right.

For the question “where”? you need to say “in the.”
Only one of the answers has an “in the” response.