The commonest cause of primary hyperparathyroidism is :: (A) Carcinoma parathyroid, (B) Solitary adenoma of parathyroid, (C) Chronic renal failure, (D) Hyperplasia of the parathyroid
Answer is B. Ans. is 'b' Parathyroid adenoma (Ref Harrison, 17/e, p 2380 & 16/e, p 2252 (15/e, p 2210)).Most common cause of primary hyperparathyroidism is parathyroid adenoma.