This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, 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: A \nExplanation: appears as a diffuse brown tan or bronze darkening of pas such as elbow , palmar crease ( Harrison 17 pg 2263)', 'role': 'assistant'}]