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: Anatomy
[{'content': 'On the basis of histologic features, Internal thoracic artery is \nSelect and explain. \nA. Medium sized arksey, B. Small sized artery, C. Large sized artery, D. Capillary', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Internal thoracic artery is a medium sized artery with histological features of Large sized artery', 'role': 'assistant'}]