This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
All of the following are signs of acute arsenic poisoning, except? 
Select and explain. 
A. Red velvety gastric mucosa on postmortem, B. Acute tubular necrosis, C. Tenesmus, D. Rain drop pigmentation
D: Rain drop pigmentation
Answer: D: Rain drop pigmentation 
Explanation: Ans. is 'd' i.e. Rain drop pigmentation o Chronic arsenic poisoning causes patchy brown raindrop type pigmentation.o Has been explained in previous sessions.