3 point symmetry is not disturbed in which fracture-
Actually, no option is correct (see previous two explanations). But I will have to find out the answer for you : -
If ulna fracture involves olecranon than the three-point bony relationship can be disturbed. This can occur either in isolated ulna fracture (option a) or ulna fracture with radium (option c).


The weak posterior capsule can cause dislocation of the elbow in which three bony point relationship is disturbed.
Isolated radius fracture will not alter three bony point relationship.
Fracture ulna only
Fracture radius only
Fracture of radius & ulna both bones of forearm
Weak posterior capsule