MCQ Question

The only people to attend a conference were four ship captains and the first mates of three of those captains. The captains were L, M, N and O; the first mates were A, D and G. Each person in turn delivered a report to the assembly as follows: Each of the first mates delivered their report exactly after his or her captain. The first captain to speak was M, and captain N spoke after him. In case A spoke immediately after L and immediately before O, and O was not the last speaker, L spoke