चीन में 'ओपन डोर' (खुले द्वार) की नीति के आर्थिक सुधार किसके द्वारा पेश किए गए थे?

Eleanor Roosevelt played a pivotal role as the Chair of the UN Human Rights Commission in drafting which historical document?

Idi Amin was a military dictator of which African nation during the 1970s?

The famous 'Iron Curtain' speech (1946) is associated with which of the following leaders?