This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'True about Trichobazoers Except \nSelect and explain. \nA. It is caused by Trichuris, B. It is a psychlatric manifestation, C. Balls of hairs in the stomach, D. Pulling the hair & sucking of hair is usually seen', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is a hairball commonly seen in the stomach of females with psychiatric illness who swallow hair regularly. Reference SRB 5th edition page no:840.', 'role': 'assistant'}]