What’s is the name of the soft tissue that the femoral condyle rest on called

The ends of the femur are covered in a smooth, slippery substance called articular cartilage. This cartilage protects and cushions the bone when you bend and straighten your knee. The normal anatomy of the knee.

answer; ///i believe that the correct answer is(5)

answer; (b) i believe its metabolic rate of the patient; plz check first