A 40-year-old male has sustained a laceration to his right forearm from a circular saw. On examination, he is unable to flex his index finger at the DIP joint (distal interphalangeal joint). Sensation is intact. What tendon has been injured?AExtensor digitorum - loss of DIP flexion is an extensor injuryBFlexor pollicis longus - which flexes the index finger DIPCFlexor digitorum superficialis (FDS) - which flexes the DIP jointDFlexor digitorum profundus (FDP) to the index finger - FDP is the only tendon that flexes the DIP joint; the tendon has been lacerated in the forearmELumbricals - which are responsible for DIP flexionCheck my answer