How many persons sit between A and D?

Read the given information carefully answer the questions given below. Twelve people are sitting in two parallel rows facing each other. In Row I: A, B, C, D, E and F are facing North, while In Row II: M, N, O, P, Q and R are facing South, but not necessarily to be in the same order. E sits second to the left of C, who is an immediate neighbour of F. A faces O, who sits immediate right of R. R neither faces C nor faces E. F is not an immediate neighbour of E. N sits second to the right of M, who does not face F. P neither faces D nor faces F. Not more than one people sit between Q and O.