International Day of Older Persons is observed on which of the following days?

In which of the following cities was the 11th World Green Economy Summit held?

Which of the following countries has recently been re-elected to Part II of the Council of the International Civil Aviation Organization (ICAO)?  

Where was the 10th National Pollution Response Exercise (NATPOLREX-X) held?

Kondareddypalli village in which state has been declared as the first 100 percent solar powered village in South India?