Answer: Central Powers: Austria-Hungary, Germany, Ottoman Empire
Allied Powers: Russia, France, Italy, Japan
Explanation: The Central Powers, which was an alliance before and during the First World War, consisted of Austria-Hungary, Germany, the Ottoman Empire, and with them was also Bulgaria. Allied forces included Russia, France, Italy and Japan of the options offered. Italy was primarily supposed to join the Central Powers but declared neutrality in 1914, in order to join the Allied Powers in 1915, signing an alliance with the Triple Entente (Britain, France, Russia). Allied Powers also included Serbia, Belgium and the United States.