In the following diagram, the triangle represents doctors, the circle represents players and the rectangle represents singers.

Which of the regions represents doctors who are players as well as singers too?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → C
Doctors who are players and singers too belong to all three groups, so their region must lie inside the triangle, the circle and the rectangle at the same time: the common part of all three shapes.

Only region C is inside all three shapes. A is outside the rectangle, B is outside the triangle and D is outside the circle.