Kalyan Chattopadhyay passed away at the age of 82. Who was he?

Scientists from which of the following countries discovered the galaxy named Alakananda with the help of the James Webb Telescope?

Which of the following has launched ‘Jal Shakti Hackathon 2025’ and Bharat-Win portal to promote innovation in the water sector?

On which of the following days is International Mountain Day celebrated every year?

In which of the following cities will the Indian Navy commission its first indigenous Diving Support Craft, DSC A20?