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: Physiology
Acromegaly is a disorder of: 
Select and explain. 
A. Excess growth hormone secretion during adulthood, B. Excess thyroxine secretion, C. Excess ACTH secretion, D. Excess FSH secretion
A: Excess growth hormone secretion during adulthood
Answer: A: Excess growth hormone secretion during adulthood 
Explanation: None