The correct answer is (a). Metternich was a conservative Austrian statesman who opposed the unification of Italy. He was the chief minister of Austria from 1821 to 1848 and was known as the “Iron Chancellor” for his efforts to suppress liberal and nationalist movements in Europe.
Garibaldi was an Italian general and patriot who led a campaign to unify Italy in the 19th century. He is known as the “Hero of Two Worlds” for his role in the unification of Italy and the liberation of Brazil.
Mazzini was an Italian nationalist and revolutionary who founded the Young Italy movement in 1831. He was a leading figure in the Italian unification movement and is considered one of the fathers of modern Italy.
Cavour was an Italian statesman who played a key role in the unification of Italy. He was the Prime Minister of Piedmont-Sardinia from 1852 to 1861 and was instrumental in the creation of the Kingdom of Italy in 1861.