International Day of Action for Rivers is observed on which date?

18th World Wind Energy Conference and Exhibition (WWEC2019) was organized in which country?

Recently, who has become the youngest player to take a hat-trick in Test cricket?

Who among the following is among the researchers to join largest ever Arctic expedition?

Which day is celebrated on 11 July every year?

Which category of compound is the most concentrated energy source?

Which form of nitrogen fertilizer will be preferred for paddy and potato?

Energy travels from Sun to Earth through