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
Action of lumbricals at this joint is: 
Select and explain. 
A. Flexion, B. Extension, C. Adduction, D. Abduction
A: Flexion
Answer: A: Flexion 
Explanation: Lumbricals and Interossei helps in Metacarpophallangeal (MCP) flexion and extension of interphallangeal (IP) joints