Eight persons-P, Q, R, S, T, U, V and W-who are playing musical chairs, are sitting around a circular table in the same order at equal distances. In each round, first the persons sitting in the opposite seats interchange their positions and then move to the adjacent seat in the clockwise direction. The game will be completed whenever all the persons return to their original positions.
After how many rounds will the game be completed

Options

A. 10th
B. 5th
C. 9th
D. 8th

Answer

D

Explanation

By analysing the given information, we get

By analysing the above table, it is clear that the game completes after the 8th round.