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: Medicine
Diminution in normal size of the body, well proportioned body, fine sparse hair on the head and other hairy regions wrinkled atrophic skin and often hypogonadism could be diagnosed as suffering from: 
Select and explain. 
A. Hypothyroidism, B. Hypopituitarism, C. Hyperthyroidism, D. None of the above
B: Hypopituitarism
Answer: B: Hypopituitarism 
Explanation: None