This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
Red velvety appearance of stomach is seen in the poisoning of 
Select and explain. 
A. Lead, B. Arsenic, C. Copper, D. Mercury
B: Arsenic
Answer: B: Arsenic 
Explanation: Black foot disease :

Chronic exposure of arsenic causef varosparm and peripheral varcular infufficiency.
Dry gangrene and spotaneous amputations of affected extremitier.
Red velvety stomach mucosa(Strawberry stomach) arsenic poisonig.
Blue linking on gems - lead(Bustonian line).
Tremors  - Mercury(intertional tremors).
Anemia - lead(microcytic hypochromic anemia).