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: Pediatrics
[{'content': 'A 13 year old boy has bilateral gynecomastia. i is height is 148 cm, weight 58 kg; the sexual maturity rating is stage 2. The gynecomastia is most likely due to – \nSelect and explain. \nA. Prolactinoma, B. Testicular tumour, C. Pubertal gynecomastia, D. Chronic liver disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]