How many persons sit between the one who sits behind of N and Y? 

Study the following information carefully and answer the questions given below: Twelve persons M, N, O, G, H, I, A, C, D, W, X and Y are sitting around a circular table in two circles. Six persons sit in each circle. M, N, O, G, H and I are sitting in inner circle, while A, C, D, W, X and Y are sitting in outer circle. All of them are facing towards the centre. One person sit between M and N. N sits in front of
X. H sits third to the left of the one who sits in front of W. G sits second to the right of H. M and G are not immediate neighbours. I sits third to the right of the one who sits in front of
A. Y sits immediate left of
D.