The correct option is A Otto Von Bismarck
Otto Von Bismarck was born on April 1, 1815, in Prussia. He was the Prime Minister of Prussia from 1862 to 1873 and again from 1873 to 1890. He played a key role in the unification of Germany with his policy of blood and iron in which military service became compulsory for all the citizens. After securing victory in the Franco-Prussian War, he convinced the South German states to be a part of unified Germany. As 'chancellor' of the new Germany, Bismarck built a powerful state with a unified national identity.