Consider the following statements regarding the Vijaynagar empire:
- It was named after the city of Vijayanagar
- Krishnadeva Raya was the greatest of all the Vijayanagar rulers.
- Kings of Vijaynagar ruled on behalf of Shaivite deity Virupaksha
- Vijaynagar empire successfully resisted the march of the Delhi sultans to the South.
Which of these statements are correct ?