All the students of class are told to sit in circle shape. Here the boy at the 6 th position is exactly opposite to 16 th boy. Total number of boys in the class?  Choose the correct choice from the following choices:
A) 10 B) 15 C) 20 D) 25 E) 30

Rationale: as half the circle shape consist of 16 - 6 = 10 boys , so total number of boys in full circle = 2 * 10 = 20 answer : c
Answer: C