As of my last update, the Honda Hornet models available in India were compliant with BSIV (Bharat Stage IV) emission standards. BSIV was the prevalent emission standard in India until March 2020 when it was superseded by the more stringent BSVI (Bharat Stage VI) standards. If you are referring to an older model of the Honda Hornet in India, it is likely to be BSIII compliant.
It's important to check the specific model year and local regulations to determine the emission standard compliance for a particular Honda Hornet model in your region, as different countries and regions have their own emission standards and timelines for implementation.