10 persons are to be arranged in a circular fashion so that in no two arrangements all the persons have same neighbours. The number of ways of doing so is equal to:

Options

A. Number of ways of arranging 10 people around a circular table divided by 2
B. Number of different garlands that can be formed using 10 different flowers.
C. Number of different necklaces that can be formed using 10 different beads
D. Number of different garlands that can be formed using 10 identical flowers.

Answer

A, B, C