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: Anatomy
[{'content': 'Which of the following muscle is not in the pectoral region ? \nSelect and explain. \nA. Pectoralis major, B. Infraspinatus, C. Pectoralis minor, D. Subclavius', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Infraspinatus", 'role': 'assistant'}]