General Studies · Puzzles

Seven boxes J, K, L, M, N, O, and P are kept in a stack from top to bottom but not necessarily in the same order. Box J is kept at the fifth position from the bottom of the stack. Three boxes are kept between M and J. Box K is kept just above J. There are two boxes between N and L, and L is kept just above box O. Box N is at one of the positions above box L. Which of the following pairs denotes the boxes kept at the topmost and bottommost positions respectively?