<prompt> Lateral dislocation of patella is prevented byRectus femorisVastus medialisVastus lateralisVastus intermedius  <response>: The lateral border provides inseion to vastus lateralis in its upper one-third or half. The medial border provides inseion to the vastus medialis in its upper two-thirds or more. Ref : B D Chaurasias Humsn Anatomy , seventh edition , volume 2 , pg, no. 22 