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: Medicine
Tiger skin appearance of colonic mucosa is seen in 
Select and explain. 
A. Melanosis coli, B. Ulcerative colitis, C. Environmental enteropathy, D. Carcinoid syndrome
A: Melanosis coli
Answer: A: Melanosis coli 
Explanation: Melanosis coli is a condition associated with chronic laxative abuse.
Imparts a brown discoloration to colonic mucosa - Tiger skin.