question_answer

Arjit being a party animal wants to hold as many parties as possible among his 20 friends. However, his father has warned him that he will be financing his parties under the following conditions only :

The invitees have to be among his 20 best friends.

He cannot call the same set of friends to a party more than once.

The number of invitees to every party have to be the same.

Given these constraints, Arjit wants to hold the maximum number of parties. How many friends should he invite to each party?

A)  11                   

B)  8            

C)  10           

D)  12