General Studies · Seating Arrangement

Six students M, N, O, P, Q, and R sit in a row facing North (not necessarily in this order) under these conditions: (i) P sits between M and O. (ii) N sits fourth to the right of Q. (iii) Q and R sit at the extreme ends of the line. (iv) M and N are not neighbors. Which of the following pairs represents the odd one out with respect to adjacent seating in the arrangement?