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': 'Ulnar nerve supplies all except ? \nSelect and explain. \nA. FCU, B. 1st lumbrical, C. 4th lumbrical, D. Dorsal interossei', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 1st lumbrical', 'role': 'assistant'}]