Avascular necrosis is the commonest in one of the following fracture -: (A) Garden 1 and 2 fracture of femoral neck, (B) Garden 3 and 4 fracture of femoral neck, (C) Sub-trochanteric fracture of femoral neck, (D) Baso-trochanteric fracture
Answer is B. AVN and non-union are almost always seen with displaced fracture (Garden's III & IV) and are less common with undisplaced fractures (Garden's I & II).