The correct option is C Submaxillary gland
Wharton's duct is the duct of the submaxillary or submandibular gland that occurs in the mouth on a papilla at the side of the frenulum of the tongue (which is a small fold of mucous membrane extending from the floor of the mouth to the midline of the underside of the tongue). The purpose of this duct is to drain the saliva.