This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology, Subject name: Forensic Medicine
Rain drop pigmentation is seen in: 
Select and explain. 
A. Penicillamine, B. Arsenic, C. Mercury, D. Lead
B: Arsenic
Answer: B: Arsenic 
Explanation: Ans: b (Arsenic) Ref: Reddy, 27th ed, p. 473Features of arsenic poisoning* Fatal dose 120-200 mg* Poisoning resembles cholera* Mees line in nails* Hyperkeratosis of palms and soles* Haemorragic spots in mucosa* Red velvety stomach mucosa* Raindrop pigmentation - measles like fading* Subendothelial petechial haemmorages* Addison like disease - due to pigmentation* Arsenic neuritis resembles that of chronic alcoholismDetectionArsenic is rapidly cleared from the body, so blood samples are useful only in acute poisoningIn chronic poisoning - Hair nails and skin samples are preservedMaximum amount is seen in liver than skin.It can be detected even in decomposed bodiesMarsh test and Reinsch test are done to detect arsenic