In which of the following countries have marine scientists discovered a giant black coral that is 300 years old?

On which of the following days is Earth Rotation Day celebrated every year?

By the end of which year has the Indian government set the target of reducing the child marriage rate by 10 percent under the Child Marriage Free India campaign?

When was the 151st Foundation Day of the India Meteorological Department celebrated?

R. K. Sriramkumar has been awarded the Sangeetha Kalanidhi Award 2026. Which musical instrument is he associated with?