Graduate Pharmacy Aptitude Test (GPAT) 2006 Solved Paper

Acetylated benzylamine upon chlorosulfonation, amidation and hydrolysis results in a product which is used as an acetate:
(P) Is Mafenide
(Q) Is N-sulfanilylacetamide
(R) For Opthalmic infections
(S) Is 4-amino phenyl benzene sulfonamide and not a true sulfonamide
Identify the correct statements.