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
Endocrine disorder is the primary cause of: 
Select and explain. 
A. Acromegaly, B. Albright's syndrome, C. Paget's disease, D. Fibrous dysplasia
A: Acromegaly
Answer: A: Acromegaly 
Explanation: None