Among the following statements , which would make M, D, N,G,L,O,A the only possible sequence of speakers?

Among the following statements , which would make M, D, N,G,L,O,A the only possible sequence of speakers? Correct Answer D is M's first mate, G is N's first mate , A is O's first mate

Related Questions

Question : How many speeches were delivered in the two days' programme ?

Statements :
I. 18 speakers were invited to give at least one speech (maximum of two speech), out of which one-sixth of the speakers could not come.
II. One-third of the speakers gave two speeches each.
The author said, "Musicians rehearse before their concerts. Actors rehearse their roles before the opening of anew play. On the other hand, I find it strange that many public speakers think they can just walk on to the stage and start speaking. In my opinion, it is no less important for public speakers to rehearse their talks." Based on the above passage, which one of the following is TRUE?