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: Surgery
Trichobezoar is - 
Select and explain. 
A. Hair ball in stomach in psychiatric patient, B. Tumours of stomach, C. TB of bowel, D. Collection of worms in stomach
A: Hair ball in stomach in psychiatric patient
Answer: A: Hair ball in stomach in psychiatric patient 
Explanation: None