Which one of the following is sesamoid bone?
Humerus bone
Femur bone
Patella bone
Frontal bone
The patella, commonly known as the kneecap, is a sesamoid bone. Sesamoid bones are small, round bones that are embedded within tendons or joint capsules. The patella is located in the front of the knee and serves to improve the mechanical advantage of protecting the knee joint. Hence, the correct answer is option 3.