Orthopaedics

A 5-year-old boy presents to the Accident Clinic with a fracture in the shaft of humerus. Then how will you exclude the involvement of radial nerve?

Inability in flexion of forearm and loss of sensation in lateral forearm

Inability in extension of wrist and loss of sensation in area over anatomical snuff box

Inability to flex the MP joint and extend the PIP joint

Inability to perform opposition