Consider the following statements regarding Kumbakonam Vetrilai (betel leaf):

1. Kumbakonam Vetrilai is grown predominantly in the fertile Cauvery river basin in Tamil Nadu.

2. The first-year harvest of Kumbakonam Vetrilai is called maaruvethalai and produces larger leaves with better shelf life.

3. Kumbakonam Vetrilai is exclusively consumed within India and not exported.

How many of the above statements are correct?