The correct option is A Collagen
White fibres are dense connective tissue. They are non-elastic fibres that are made up of collagen fibres, contributing to the considerable mechanical strength of white fibrous tissue. It is silvery-white in colour. It is physically tough and pliable. Examples of these include ligaments and tendons.
Reticular fibres are usually observed as a delicate meshwork of fine fibrils. Collagen fibres are not reticular.