If all the persons are made to sit in alphabetical order with respect to O in clockwise direction, then how many persons remain unchanged in their position, excluding O?

Study the following information carefully and answer the questions given below. Eight persons O, P, X, Z, K, M, G and H are sitting on a circular table such that four persons are facing inwards while four persons are facing outwards alternatively, but not necessarily in the same order. G sits third to the left of H whereas M sits second to the right of H. Two persons are sitting between M and K. The number of persons between K and G is same as the number of persons between H and O, when counted from the right of K and O. Z neither sits facing outside nor adjacent to M but adjacent to P.