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': 'Power grip of hand is due to \nSelect and explain. \nA. Palmaris, B. Long flexors, C. Sho flexors, D. Lumbricals', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In power grip, the extrinsic muscles provide the major force, the interossei are used as flexors and rotators at the metacarpophalangeal joints, and the thenar muscles are generally active', 'role': 'assistant'}]