This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
Primary hyperparathyroidism, phaeochromocytoma may be associated with which type of thyroid cancer? 
Select and explain. 
A. Medullary carcinoma of the thyroid, B. Papillary carcinoma of the thyroid, C. Anaplastic carcinoma of the thyroid, D. Follicular carcinoma of the thyroid
A: Medullary carcinoma of the thyroid
Answer: A: Medullary carcinoma of the thyroid 
Explanation: Ref : Bailey and love surgery text book 27th Ed. It is characterized clinically by medullary thyroid carcinoma (MTC), pheochromocytoma, and hyperparathyroidism. Approximately 70-95% of individuals with MEN 2A develop MTC, 50% develop pheochromocytoma, and 15-30% develop hyperparathyroidism.