This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Anatomy
[{'content': 'Parathyroid adenoma most commonly involves which of the following site \nSelect and explain. \nA. Thyroid substance, B. Superior parathyroid lobe, C. Inferior parathyroid lobe, D. In the mediastinum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Adenomas are most often located in the inferior parathyroid glands, but in 6-10% of patients, parathyroid adenomas may be located in the thymus, the thyroid, the pericardium, or behind the esophagus.', 'role': 'assistant'}]