Study the given diagram carefully and answer the question. The numbers in different sections indicate the number of persons.
(Three sets are shown in the diagram representing Women, Politicians, and Poets.)

How many women poets are politicians?

Correct option is B

The Map:
Circle = Women
Rectangle = Poets
Triangle = Politicians

The Logic: You need to find the single number that is trapped inside the Circle, the Rectangle, AND the Triangle all at the same time.

Visual Check: Look at the diagram.
The number 5 is only in the Circle and Triangle (Women + Politicians).
The number 9 is only in the Triangle and Rectangle (Politicians + Poets).
The number 4 is the only one sitting in the exact center where all three shapes overlap.
Logic Shortcut: Intersection of All 3 Shapes = 4.