This game requires us to rank the salary of 9 partners. The question asks us if N salary is the same as any other partner, in other words, N and another partner have the same rank, then which of the following must be false?
The game involves the following rules:
H > J > G > M > F > I > K N > L
This question tells us that N is ranked as some other partner - it could be any partner but L and K who are ranked higher than N. So let's think of a couple of scenarios - let's say N has the same salary as I then we would have the following overall order:
H J G M F N/I L K
The lowest possible salary N could match is H
H/N J G M F I L K
This still tells us nothing about the placement of L except for the fact that is must be ranked lower than K but it could be ranked as low as 3d or as high as 8th, these are both valid scenarios if H and N have the same salaries:
(1) H/N L J G M F I K (2) H/N J G M F I L K
The only scenario that CANNOT be true is L cannot be ranked lower than H because H is the lowest salary that N could match, and L must be ranked higher than L (D).
Let me know if this helps and if you have any other questions.