Which of the following must be true of the order in which the pieces are played?

A jazz group plans to play six songs during a show which are in the order of J, K, L, M, N, O. Each piece will be played exactly thrice. The order in which the pieces are to be played is subjected to the following conditions. N must be played before J and before O. M must be played later than J. K must be played third in piece.

Yes, it's correct choice    In the sequence M J K O L N; N is played before J and O which doesn't satisfy the conditions

N must be played before J and before O

N J O 

M must be played later than J

N J O M or N O J M

K must be played third in piece

One of the possibilities i ||||||| |---|---|---|---|---|---| |1|2|3|4|5|6| |N| L|K|J|O|M|

L is played before K   ||||||| |---|---|---|---|---|---| |1|2|3|4|5|6| |N|L|K|J|M|O| |N|J|K|L|M|O|

In every possibility M is played after N

So, this must be true 

So, in the second possibility L is played before K

This is not a true condition