This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Red velvety appearance of stomach mucosa is seen in the poisoning of 
Select and explain. 
A. Lead, B. Arsenic, C. Copper, D. Mercury
B: Arsenic
Answer: B: Arsenic 
Explanation: (Refer: Rajesh Bardale - Principle of Forensic Medicine & Toxicology, 1st edition, pg no: 430)