<prompt> 3 point symmetry is not disturbed in which fracture?Fracture ulna onlyFracture radius onlyFracture of radius and ulna both bones of forearmWeak posterior capsule  <response>: Weak posterior capsule may disrupt three point bony relation by promoting subluxation or dislocation of elbow. Fracture ulna on the upper end i.e. involving olecranon also disturb three point symmetry, but the radius has nothing to do with three point bony relationship and so it will not disturb three point bony symmetry. Ref: Apleys 8e, Page 596-609. 