Skeleton of arms and legs is:

Explanation

Option A: An exoskeleton is a hard, external skeleton that protects the body of some animals, such as insects and crabs. It is not found in humans. Option B: An endoskeleton is an internal skeleton that is made up of bones and cartilage. It is found in all vertebrates, including humans. The endoskeleton provides support and movement to the body, and it also protects the vital organs. Option C: The axial skeleton is the part of the skeleton that includes the bones of the head, neck, and trunk. It consists of 80 bones, including the skull, the vertebral column, the ribs, and the sternum. The axial skeleton provides support for the head and trunk, and it also protects the brain, spinal cord, and heart. Option D: The skeleton of arms and legs is the appendicular skeleton. The appendicular skeleton is the part of the skeleton that includes the bones of the limbs, as well as the pectoral and pelvic girdles. It consists of 126 bones, which are divided into the upper extremities (arms) and the lower extremities (legs). The upper extremities include the humerus (upper arm bone), the radius and ulna (forearm bones), the carpals (wrist bones), the metacarpals (hand bones), and the phalanges (finger bones). The lower extremities include the femur (thigh bone), the tibia and fibula (shin bones), the tarsals (ankle bones), the metatarsals (foot bones), and the phalanges (toe bones). The appendicular skeleton is responsible for providing support and movement to the arms and legs. It also protects the vital organs in the chest and abdomen. The bones of the appendicular skeleton are held together by ligaments and tendons, which allow for a wide range of movement.