Which statement is true about the radial artery?

The correct answer states that the radial artery begins 1 inch below the antecubital fossa. This location is clinically significant, as it marks where the radial artery branches from the brachial artery, typically found in the arm. Understanding the anatomy of the radial artery is important in medical practices such as taking pulse measurements or performing arterial blood draws.

The other statements are not accurate in describing the radial artery. It does not begin at the wrist since it is a continuation of the brachial artery and is located more proximally in the arm. Additionally, the radial artery is not located in the leg; such a distinction applies to other arteries like the femoral or popliteal arteries. Finally, the radial artery does not supply blood to the lungs; that role is specific to the pulmonary arteries, which deliver deoxygenated blood from the heart to the lungs for oxygenation.