<prompt> Most common cause for primary hyperparathyroidism is:Single adenomaMultiple adenomasSingle gland hyperplasiaMultiple gland hyperplasia  <response>: - Solitary adenoma is the most common cause 80 - Parathyroid adenomas are most commonly located in inferior parathyroid glands Primary Hyperparathyroidism PHPT- Caused by increased secretion of Parathyroid hormone PTH from abnormalparathyroid gland- More common in females- MC cause of PHPT - Solitary Adenoma 80 of casesMC location - Inferior parathyroid 