The correct options are
B Ottoman empire was replaced in Turkey.
D Disintegration of Austria - Hungary.
The First World War had many consequences:
1) It enabled the socialist revolution in 1917 transform Russia into a socialist country.
2) Germany overthrew the monarchy and became a republic.
3) The Ottoman Empire was replaced by a democratic and secular state in Turkey.
4) New countries like Austria, Hungary, Yugoslavia, Czechoslovakia, Estonia, Latvia, Finland came into existence.