Consider the following statements regarding Cave architecture in India:

1. Barabar caves are carved out from monolithic granite rock.

2. The walls of Lomas Rishi caves comprises inscriptions of Ashoka and various other motifs.

3.  According to the inscription found at the entrance of Sudama cave, Chandragupta Maurya dedicated the cave to Ajivikas.

Which of the statements given above is/are not correct?