This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
[{'content': 'Total number of dorsal interossei \nSelect and explain. \nA. 2, B. 3, C. 4, D. 5', 'role': 'user'}, {'content': 'Answer: C \nExplanation: There are 4 dorsal interossei muscles and 4 palmar interossei muscles. Dorsal and palmar interossei are supplied by the deep branch of the ulnar nerve. Dorsal interossei help in the abduction of digits. Ref: BD Chaurasia 7th edition; Page no: 182', 'role': 'assistant'}]