Collagen is a _______.

The correct option is C Fibrous protein
Collagen is a fibrous protein present in the white fibres of connective tissue. Fibrous proteins, also called scleroproteins, are long filamentous protein molecules. Fibrous proteins are only found in animals. Fibrous proteins form 'rod' or 'wire' like shapes and are usually inert structural or storage proteins. They are generally water-insoluble.