(A) ** Russia
(B) Germany
(C) Austria-Hungary
(D) Ottoman Empire
EXPLANATIONS BELOW
Concept note-1: -The major allied powers in the First World War were the Great Britain, France and Russia. America also participated from Allies side in 1917. Germany, Austria-Hungary and Turkey played the role of Central Powers.
Concept note-2: -By 1910 most of the major states of Europe belonged to one or the other of these great opposing alliances: the Central Powers, whose principal members were Germany and Austria-Hungary, and the Allies, composed of France, Russia, and Great Britain.
Concept note-3: -The Central Powers were Germany, Austria-Hungary, and Turkey, while the Allies including France, Britain and its domain, Russia, Italy, Japan, and from 1917, the United States of America.
Concept note-4: -The Central Powers’ origin was the alliance of Germany and Austria-Hungary in 1879. Despite having nominally joined the Triple Alliance before, Italy did not take part in World War I on the side of the Central Powers.
Concept note-5: -The Allies described the wartime military alliance of Germany, Austria-Hungary, Bulgaria and the Ottoman Empire as the ‘Central Powers’.