<prompt> The malunion of Supracondylar fracture of the humerus most commonly involved in ?Flexion defornityCubitus varusCubitus valgusExtension deformity  <response>: Cubitus varus also known as gun stock deformity It is the most common complication of Supracondylar fracture of humerus Refer Maheshwari 9th e p 102 