Fracture of proximal forearm cast position is: (A) Pronated flexion, (B) Neutral position, (C) Supinated position, (D) Position does not matter
Answer is C. Definition of supination.
1: rotation of the forearm and hand so that the palm faces forward or upward; also :

a corresponding movement of the foot and leg in which the foot rolls outward with an elevated arch.

2: the position resulting from supination.