BAL (British anti-Lewisite, Dimercaprol) is of no value for the treatment of poisoning by: (A) Arsenic, (B) Mercury, (C) Zinc, (D) Selenium
Answer is D. BAL (British anti-Lewisite, Dimercaprol) is a dithiol-chelating agent used in the treatment of poisoning by the heavy metals.It is of no value for the treatment of poisoning by selenium, iron, or cadmium; in fact, it is contraindicated in these poisonings because the BAL metal (mercaptide) complex may be more toxic than the metal alone.