With reference to the Udaigiri-Khandagiri caves, which of the following statements is/are correct?
1. They are examples of the rock-cut cave tradition.
2. These caves have inscriptions of Kharavela kings.
3. The caves were primarily meant for Buddhist monks.
Select the correct answer using the code given below:
1. Only 2
2. Only 1 and 3
3. Only 1 and 2
4. 1, 2 and 3