Which country recently announced its withdrawal from 66 international organizations, including the International Solar Alliance?

Which country has the United States recently invited to join the Pact of Silica? 

At which of the following locations was the first meeting of the Payment Regulatory Board held? 

Who among the following has been appointed as the Director General of the National Investigation Agency?

The book titled ‘Sing, Dance and Lead’, which was launched by Vice President CP Radhakrishnan, was written by whom?