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
'Weak giants' are produced by: 
Select and explain. 
A. Thyroid adenomas, B. Thyroid carcinomas, C. Parathyroid adenomas, D. Pituitary adenomas
D: Pituitary adenomas
Answer: D: Pituitary adenomas 
Explanation: 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.