Papia has 16 marbles in her pocket. She has 8 red ones, 4 green ones and 4 blue ones. What is the minimum number of marbles she must take out of her pocket to ensure that she has one of each color?

A 4

B 8

C 12

D 13

Correct Answer: Option D

minimum number of marbles she must take out of her pocket to ensure that she has one of each color =(8+4+4+1) = 13