During the standard volar Henry approach to the distal radius for open reduction and internal fixation of a Colles’ fracture, the surgeon must meticulously develop a safe internervous interval. Superficially, this plane is established by retracting the flexor carpi radialis (FCR) ulnarly and retracting which specific structure radially?

Explanation:
The correct option is c. The volar Henry approach is the true workhorse for distal radius surgery. The superficial surgical interval is created directly between the flexor carpi radialis (FCR) tendon (which is retracted forcefully toward the ulnar side to protect the underlying median nerve) and the radial artery (which must be carefully identified, protected, and retracted strictly toward the radial side). Deep to this interval, the surgeon identifies the flexor pollicis longus (FPL), retracts it ulnarly, and incises the pronator quadratus to finally expose the bare volar cortex of the radius. Reference: Hoppenfeld S, deBoer P. Surgical Exposures in Orthopaedics. Classic Ortho mcq surgical approach.