<prompt> Action of Lumbricals isFlexion at Metacarpo - Phalangeal joint and flexion at Interphalangeal jointExtension at Metacarpo - Phalangeal joint and extension at Interphalangeal jointFlexion at Metacarpo - Phalangeal joint and extension at Interphalangeal jointExtension at Metacarpo - Phalangeal joint and flexion at Interphalangeal joint  <response>: Action of Lumbricals is Flexion at Metacarpo - phalangeal joint and extension at Interphalangeal joint. 