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
[{'content': 'Regarding Addisonian pigmentation, all are true EXCEPT : \nSelect and explain. \nA. Involves moles and scars, B. Involves palmer creases, C. Does not involve oral mucosa, D. Decreased fibrosis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Answer is C (Does not involve oral mucosa) : Pigmentation in Addison's disease In Addison's disease pigmentation appears as a diffuse brown, tan, or bronze darkening of skin This increased pigmentation is diffuse but may be accentuated in the Palmer crease Sites of friction & pressure areas - knuckles, elbows, knees, nail beds - belt brassier line, buttocks Scars Oral mucosa, gums & conjunctival Areolae of nipples", 'role': 'assistant'}]