On which of the following days is the International Day for Countering Hate Speech observed every year?

Who among the following has been appointed as the Chairperson of the High-Level Technical Expert Group on Labour Statistics? 

On which of the following days is International Archives Day celebrated every year?

Who among the following has been appointed as India’s new Executive Director at the World Bank?

On which of the following days is World Blood Donor Day observed every year?