Which artery is located behind the knee?

The popliteal artery is the correct answer because it is the major artery located behind the knee joint. This artery is a continuation of the femoral artery and is responsible for supplying blood to the knee area and the lower leg. It branches off into the anterior and posterior tibial arteries further down, which supply the lower extremities.

The radial artery, while an important vessel, is located in the forearm and wrist and does not have any relation to the anatomy of the knee. The coronary artery is associated with supplying blood to the heart muscle and is not relevant to the knee region. Lastly, the femoral artery is located in the thigh and becomes the popliteal artery as it passes into the region behind the knee.