(A)- (S); (B)- (R); (C)- (P); (D)-(Q)
(A)- (R); (B)- (S); (C)- (Q); (D)-(P)
(A)- (S); (B)- (R); (C)- (Q); (D)-(P)
(A)- (R); (B)- (S); (C)- (P); (D)-(Q)
Phenelzine contain hydrazine, choloroxylenol contains phenol, uracil contains pyrimidine ring and rantitidine contains furan ring. Hence, the option B is correct.