Which of the follow statements is true as demonstrated on a lateral elbow projection?

a. When the wrist is in a lateral projection, the radial tuberosity is superimposed by the radius.
b. The radial tuberosity should be demonstrated in profile posteriorly for optimal positioning.
c. When the hand is pronated, the radial tuberosity is seen in profile anteriorly.
d. When the hand is supinated, the radial tuberosity is superimposed by the radius.

A