This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb : Miscellaneous, Subject name: Anatomy
[{'content': 'Action of lumbricals at this joint is: \nSelect and explain. \nA. Flexion, B. Extension, C. Adduction, D. Abduction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lumbricals and Interossei helps in Metacarpophallangeal (MCP) flexion and extension of interphallangeal (IP) joints', 'role': 'assistant'}]