Description : The tusk of elephant is an enormously enlarged - (1) upper incisor (2) upper canine (3) lower canine (4) lower incisor
Last Answer : (1) upper incisor Explanation: Tusks are elongated, continuously growing front teeth, usually but not always in pairs, that protrude well beyond the mouth of certain mammal species. They are most ... , mastodons, and mammoths all have upper incisor teeth that emerge from the skull as tusks.