Indian Institute of Foreign Trade 2012 Solved Paper

Since, M worked previous week thus, he won't work this week
We are given J will only work on episodes on which M is working.
Thus, J cannot work.
N and O are already working and N will not work with K under any circumstances.
We are also given that:- At least three of the actors must appear in every weekly episode.
Thus, L will have to work
Hence, option D is the correct answer.