<prompt> A patient presented with inability to flex distal interphalangeal joint of fouh and fifth finger, and is unable to hold a card between his fingers. Fracture at which of the following site might have damaged the nerve, leading to this set of clinical featuresABCD  <response>: Inability to flex distal interphalangeal joint flexor digitorum profundus of 4th 5th finger supplied by ulnar nerve Is not working Card test is positive palmar interossei are affected PAD-Palmar interossei are for adduction due to ulnar nerve injury. Head of humerus is medial so D is medial epicondyle. Ulnar nerve passes posterior to medial epicondyle Ulnar nerve injury results in ulnar claw hand 