In which of the following cities, India’s first ring metro has been launched by PM Modi?

Who among the following has launched mascots named Pragati and Vikas for Census 2027?

On which of the following days is the International Day of Action for Rivers celebrated every year?

With whose collaboration has the Ministry of Education developed the Saathi app to assist students preparing for competitive examinations? 

In which of the following states has a new species of earthworm named ‘Drawida wazhaniya’ been discovered?