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 is the investigation to know the functionality of the gallbladder \nSelect and explain. \nA. MRCP, B. PTC, C. HIDA scan, D. EUS scan', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hida scan is used to see function', 'role': 'assistant'}]