When did the Korean war end?

During the First World War, which country signed the Peace Treaty (1917) with Germany

A. England

B. USA

C. Russia

D. Austria

When did United Kingdom declared war on Germany which lead to World War II?

A. 4th April 1939

B. 18th August 1939

C. 28th August 1939

D. 3rd September 1939

In which year, America joined the Second World War

A. 1939

B. 1940

C. 1941

D. 1942

The immediate cause for the outbreak of the first World War was

A. The assassination of Archduke Francis Ferdinand

B. The imprisonment of Lenin

C. The ambition of America to dominate the world

D. The sudden death of Lloyd George