Yes. This operator has a licence from Curacao. This jurisdiction is often chosen by international operators, who want to provide their games to countries across the world, like India. An independent body, TST or Technical Systems Testing, test the games to check that they are fair and accurate.
There are other signs that Rabona Casino is legitimate, though. It has a privacy policy, clear terms and conditions, and is committed to responsible gaming. Players need to be over 18 to enjoy the games and sports betting at this site.