Which of the following statements are correct?
1. Prehistoric sites like Bhimbetka, Hoshangabad, Sagar, etc are located in Madhya Pradesh.
2. Ujjain, Sanchi, and the Stupas of Bharhut are known for prehistoric era sites.
3. The remains of Mauryan civilization are derived from Gurjara (Datia district).
1. 1 and 2
2. 2 and 3
3. 1 and 3
4. 1, 2 and 3