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: Pathology
[{'content': 'Which of the following is most often involved in Multiple Endocrine Neoplasia 1 (MEN 1): \nSelect and explain. \nA. Pituitary, B. Pancreas, C. Parathyroid, D. Thyroid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Parathyroid', 'role': 'assistant'}]