1.  In the given figure if Triangle represents healthy people, Square represents old persons and Circle represents men then What is the number of those men who are healthy but not old ? 
A. 3
B. 4
C. 6
D. 2

Answer: Option D

Explanation:

In this, the combination of healthy people and men are 2 & 4, in this 4 belongs to the old persons also, so we don't require old persons so 2 is the answer.