Which of the following countries recently launched a nuclear-powered submarine called Khabarovsk?

The Supreme Court recently directed the formation of a dedicated water dispute tribunal to resolve the water dispute between Karnataka and Tamil Nadu over which river? 

The Black Swan Summit 2026 for Artificial Intelligence, Fintech, and Insurtech was held for the first time in India in which city?

Which of the following countries has recently launched the first national biobank dedicated to rare diseases? 

Who among the following has been appointed by the Delhi Government as the brand ambassador of the first Delhi Khel Mahakumbh?