Which of the following is a carbohydrate?

Cellulose is a polysaccharide (a sugar) that is made up of a linear chain of several hundred to many thousands of β linked D-glucose molecules. Carbohydrates are built from simple sugars.
Adenosine triphosphate (ATP) is a complex organic chemical that provides energy to drive many processes in living cells, (e.g. muscle contraction, nerve impulse propagation, and chemical synthesis).
Collagen is the main structural protein in the extracellular space in the various connective tissues in the body.
Myosins are a family of motor proteins that play roles in muscle contraction as well as a range of other motility processes in eukaryotic organisms.