If all the persons are asked to stand in alphabetical order from left to right, the positions of how many will remain unchanged

If all the persons are asked to stand in alphabetical order from left to right, the positions of how many will remain unchanged?

A. 1

B. 2

C. 3

D. 4

In alphabetical order, it will be C D E F G H.

Actual seating arrangement will be, C F G D H E.