This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Ectopic rest of normal tissue is known as - \nSelect and explain. \nA. Choristoma, B. Hamaoma, C. Pheudotumor, D. Lymphoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Choristomas, forms of heterotopia, are closely related benign tumors, found in abnormal locations. The two can be differentiated as follows: a hamaoma is an excess of normal tissue in a normal situation (e.g. a bihmark on the skin), while a choristoma is an excess of tissue in an abnormal situation (e.g. pancreatic tissue in the duodenum).', 'role': 'assistant'}]