Which one of these rulers did not belong to the Habsburg dynasty?

Philip V did not belong to the Habsburg dynasty because he was a member of the House of Bourbon. He became King of Spain in 1700 after the War of Spanish Succession, when the Habsburg line in Spain ended with the death of Charles II. As a Bourbon, Philip V was a descendant of Louis XIV of France, and his accession to the Spanish throne marked the beginning of the Bourbon dynasty in Spain.