Four of the following five belong to a group in a certain way, find which one of the following does not belong to that group?

Only one box is placed between box I and M in column II. Box C is placed immediately below box I. Box L is placed in the west of box C. Only one box is placed between box L and box G in the same column. From these conditions we have three possible cases. There are two boxes placed between box G and box H, which is placed below the box G in the same column. By this condition case- 2 and case- 3 are cancelled. Box J is placed to the immediate east of box X. Only one box is placed between box J and box A in the same column. Box N is placed immediately above box A. By these conditions one more case added in case- 1. So new arrangement will be – Only one box is placed between box N and box E in the same column. Box K is placed immediately below box F. By this condition case- 1a is cancelled. Box B is not placed in same column with box E. Box D is not placed at bottom of any of the column. So final arrangement will be-