The following figure is a combination of 4 figures, A, B, C and D. Figure A represents the number of people who drink Coca Cola. Figure B represents the number of people who drink Pepsi. Figures C and D represent the number of people who drink Sprite and Fanta, respectively. How many people drink both Pepsi and Sprite but NOT Fanta?

There is a relation between B and C because some part of the Pepsi in the part of Fanta.

only 1 person drinks both Pepsi and Fanta.

So that the correct option is (a) 1