<prompt> In Mckern and Stewa maturation score of skeletal age, which of the following epiphyseal union is not used?Humerus - Proximal endRadius - Proximal endFemur - Distal endIliac crest  <response>: Mckern and Stewa maturation score of skeletal age Humerus - Proximal end and medial epicondyle Radius - Distal end Femur - Head and Distal end Iliac crest. Sacrum--Lateral poion and 3,4th segments. The scoring is given based on the degree of epiphyseal union that is: 