Question

which allied leader was not a member of the \big three\ at potsdam?
charles de gaulle
harry truman
winston churchill

Explanation:

The "Big Three" at the Potsdam Conference were Harry Truman (President of the United States), Winston Churchill (Prime - Minister of the United Kingdom, later replaced by Clement Attlee), and Joseph Stalin (Premier of the Soviet Union). Charles de Gaulle was not part of the "Big Three".

Answer:

A. Charles de Gaulle