Question

The tusk of elephant is formed from

• A. Skull
• B. Canine
• C. Incisors
• D. Snout

Answer 1

Answer: (C)

Incisors

1. Tusks are elongated, continuously growing front teeth, usually but not always in pairs, that protrude well beyond the mouth of certain mammal species. The tusks of an elephant are modified second incisors in the upper jaw.
2. They replace deciduous milk teeth at 6–12 months of age and grow continuously at about 17 cm (7 in) a year. A newly developed tusk has a smooth enamel cap that eventually wears off. Hence, the tusk of an elephant is formed from incisors.
   

So, the correct answer is 'incisors'.