Consider the following Statements regarding the history of Kashmir during the ancient and early medieval age –

1. Kashmir was the part of Ashoka’s empire and Srinagar was founded by him.
2. Kalhana’s authoritative work ‘Rajatarangini’ is on history of Kashmir.
3. Zain-ul-Abidin was a great liberal king known as ‘Akbar of Kashmir’.
4. Kashmir was annexed to the Mughal Empire by Akbar

Which of the above statements is / are correct?