Four boys A, B, C, D facing south and four girls P, Q, R, S facing north are to be seated in two rows with four chairs each. Boys and girls face each other. Further
I. A does not sit at any of the extremes.
II. B and S always sit in front of each other.
III. R and Q are never adjacent to each other.
IV. P is sitting in one of the extremes and doesn’t want tosit in front of her.
Who is sitting in front of A?