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
Most common endocrine disturbance associated with vitiligo is - 
Select and explain. 
A. Addison's disease, B. Thyroid disease, C. Diabetes insipidus, D. Diabetes mellitus
B: Thyroid disease
Answer: B: Thyroid disease 
Explanation: Option a, b & d, all are associated with vitiligo. However, thyroid disease is most common.
"Vitiligo is frequently associated with disorders of autoimmune origin with thyroid abnormalities being the most common".... Essential dermatology.