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': 'True about cephalic vein \nSelect and explain. \nA. Cephalic vein end by fusion with brachial vein, B. Accompany ulnar nerve, C. Lies in delta pectoral groove, D. Drain in medial side of forearm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]