Things to do in Hyderabad for a couple of days?

Came to this lovely city to take up an exam. Extended my stay for a couple more days. Have no idea as to what to do. Suggestions please? So far, I’ve added Apricot Delight on the list to try. P.S: For food spot suggestions, please suggest places where vegetarian food is good too! And places with accessible metro transit would also be preferred!

Thanks in advance!