The writ of 'Quo Warranto' literally translates to "by what authority?". It is a judicial remedy used to challenge a person's right to hold a public office. The court issues this writ to inquire into the legality of the claim which a person asserts to a public office. If the claim is found to be invalid, the court can oust the person from that office. Options (A) and (B) describe the writs of Mandamus and Prohibition/Certiorari, respectively. The specific purpose of Quo Warranto is to prevent the usurpation of a public post.