What covers the ends of bones in adults?

A blood

B cartilage

C marrow

D ligaments

Answer: cartilage

Explanation: Cartilage is a type of connective tissue, tough and flexible that serves as a protection to the ends of the bones and allows them to move. Cartilage is made up of a dense network of collagen fibres in a gelatinous substances. There are three main types of cartilage: hyaline cartilage, elastic cartilage and fibrocartilage.

Answer is

Cartilage