Task: Question Answering
Input (English): Question: In a guess game , five friends had to guess the exact numbers of balls in a box.
Friends guessed as 31 , 35, 39 , 49 , 37, but none of guess was right.The guesses were off by 1, 9, 5, 3, and 9 (in a random order).
Can you determine the number of balls in a box ?

 Option A: 30 balls

 Option B: 35 balls

 Option C: 40 balls

 Option D: 45 balls

 Option E: 50 balls
Output (English): Option C