In the given figure, the triangle represents unhealthy, the square represents young, and the circle represents a person. Find out the area from the figure which represents the person who is unhealthy but not young.

3

Triangle is unhealthy
Square represents young
Circle represents person
We have to search for the area which is related to person and unhealthy but not young. And, the square area is young so we do not consider that area means 5,4,6,7 
2 represent only unhealthy
8 represent only person
But 3 represents both person and unhealthy but not young
So, the correct answer is 3.