This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of pituitary gland, Subject name: Medicine
[{'content': 'The following are recognized features of pan-hypopituitarism except? \nSelect and explain. \nA. Increased insulin sensitivity, B. Pigmentation of the mucous membranes, C. Low serum thyroxine and TSH levels, D. Loss of secondary sex characters', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Since ACTH has a paial MSH(Melanocyte Stimulating Hormone) like activity and levels of ACTH in Pan-hypopituitarism will fall, the hyperpigmentation cannot occur. However diseases with Increased ACTH like Addison disease will show hyperpigmentation. Insulin sensitivity implies hypoglycemia. LH/FSH fall will cause loss of secondary sexual features.', 'role': 'assistant'}]