The correct option is C 1914
First World War also known as 'The War to end all the Wars' and 'The Great War', broke out between two alliances of Europe named Triple Entente, which consisted of British, France and Russia and Triple Alliance which consisted of Germany, Austria-Hungary and Italy, it all started when Austria-Hungary declared war against Serbia, accusing them of assassination of Archduke Franz Ferdinand and his wife Sophie, one after other entered the war and it soon turned out to be a global affair.