6. 

Study the diagram and identify the people who can speak only one language.

A. L + M + O
B. K + J + I
C. K
D. I

7. 

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