This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pediatrics
[{'content': "'Weak giants' are produced by: \nSelect and explain. \nA. Thyroid adenomas, B. Thyroid carcinomas, C. Parathyroid adenomas, D. Pituitary adenomas", 'role': 'user'}, {'content': "Answer: D \nExplanation: d. Pituitary adenomas(Ref: Nelson's 20/e p 2714-2724)Hyperpituitarism causes tall stature (Giants), with weak muscles; Most common cause of Hyperpituitarism is Pituitary adenoma.", 'role': 'assistant'}]