Which of the Following Are True Regarding the Correct Position

Which of the following are true regarding the correct position for an AP projection of the lower leg?
1) The leg should be extended and resting on the IR.
2) The ankle should be dorsiflexed so that the foot forms a 90-degree angle with the lower leg.
3) The sagittal plane of the leg should be placed parallel to the IR.

A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) 1, 2, and 3