This is testing the deduction we made in the setup. We can never have N.
Why? If you have V in, then you need M, not N. And if you don’t have V in, then you need W and U. That makes the antibiotics G and H, because W doesn’t go with F.
If we have G, we need one of N or U to be out. We already have U, so N has to be out.
C is CORRECT.