Task: Question Answering
Input (English): Question: In a box, there are 7 red, 3 blue and 5 green balls. One ball is picked up randomly. What is the probability that it is neither blue nor green?

 Option A: 2/3

 Option B: 8/21

 Option C: 3/7

 Option D: 7/15

 Option E: 10/21
Output (English): Option D