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: Dental
[{'content': "Most common endocrine disturbance associated with vitiligo is - \nSelect and explain. \nA. Addison's disease, B. Thyroid disease, C. Diabetes insipidus, D. Diabetes mellitus", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Option a, b & d, all are associated with vitiligo. However, thyroid disease is most common.\n"Vitiligo is frequently associated with disorders of autoimmune origin with thyroid abnormalities being the most common".... Essential dermatology.', 'role': 'assistant'}]