Which of the following has released the world’s most detailed 3D atlas of human brainstem, named ANCHOR?

On which of the following days is the World Day to Combat Desertification and Drought observed every year? 

Who among the following has been appointed as the Chief of Army Staff of India?

Which of the following has launched the ‘Navachar Mantra’ initiative to strengthen grassroots entrepreneurship and empower innovators in India?

Who has recently become the world’s first trillionaire?