External rotation refers to:

• A. Rotating toward the midline
• B. Bending the knee
• C. Rotating away from the midline
• D. Flexing the wrist

Answer: (C)

External rotation means turning a limb so the distal segment moves away from the midline of the body. In other words, the limb rotates outward relative to the body's center. This is the opposite of internal rotation, which brings the limb toward the midline. So bending the knee or flexing the wrist aren’t rotations at all, they’re flexion movements, which is why they don’t describe external rotation. The movement described here is rotating away from the midline, such as turning the arm or leg outward.