Drug containing two sulfhydryl groups in a molecule?: (A) BAL, (B) EDTA, (C) Pencillamine, (D) None of the above
Answer is A. Ans. is 'a' i.e., BAL o Dimercaprol (British Anti-Lewisite, BAL) contains two sulfahydryl groups. Note - Penicillamine has one SH group.