The question is about the Yalta Conference.
The leaders who did not attended the Yalta Conference because of their some other personal committments.
Harry S, Truman was the leader who did not attended Yalta conference.
Yalta Conference:
This was the meeting held in the year 1945, during the scond world war time.
The leaders who attended Yalta conference were Joseph Stalin who was Soviet Premier, Roosevelt, Franklin who was president of U.S and Winston Churchill who was British Prime Minister.
Therefore the correct answer is C.
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