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: Surgery
[{'content': 'Which of these statements is false about medullary carcinoma? \nSelect and explain. \nA. Calcitonin is tumor marker, B. Arises from neural crest, C. Associate with MEN 1 syndrome, D. Diarrhoea is predominant', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]