With reference to the Pallavas, consider the following statements:

1. It emerged as a formidable power in South India, that existed from 275 CE to 897 CE.

2. They gained prominence after the eclipse of the Ganga dynasty.

3. They became a major power during the reign of Mahendravarman I and Narasimhavarman I.

4. They were finally defeated by the Chera ruler Aditya I in the 9th century CE.

Which of the above statements are correct?