Physical examination reveals weakness of medial deviation of the wrist (adduction), loss of sensation on the medial side of the hand, and clawing of the fingers. Where is the most likely place of injury?
A
Compression of a nerve passing between the humeral and ulnar heads of origin of flexor carpi ulnaris
B
Compression of a nerve passing at Guyon's canal between the pisiform bone and flexor retinaculum
C
Compression of a nerve passing through the carpal tunnel
D
Compression of a nerve passing between the ulnar and radial heads of origin of flexor digitorum superficialis