(A) P,R
(B) Q,R,S
(C) P,Q
(D) R,S
Rifampin is an enzyme inducer
(A) Ethambutol, optic neuritis
(B) Rifampicin, liver damage
(C) Capreomycin, Deafness
(D) Cefalexin, ototoxicity
Cefalexin is a cephalosporin that causes hypersensitivity and diarrhea as main side effects. Rarely, they can also cause nephrotoxicity but they do not produce ototoxicity. Antibiotics like vancomycin, aminoglycosides and diuretics such as loop diuretics produce ototoxicity.