Step 1: Role of Bismarck in German Unification
The unification of Germany in the 19th century was primarily achieved through the efforts of Otto von Bismarck, the Prime Minister of Prussia. He used diplomatic strategies, alliances, and wars to unite the various independent German states into a single nation-state under Prussian leadership.
Step 2: Why the other options are incorrect
- (A) Hitler: Although Adolf Hitler played a significant role in 20th-century German history, he was not involved in the unification of Germany, which happened long before his rise to power.
- (C) Mussolini: Mussolini was the key figure in the unification of Italy, not Germany.
- (D) Garibaldi: Garibaldi played a major role in the unification of Italy, not Germany.
Thus, the correct answer is option (B) Bismarck.
$PQ$ is a chord of length $4\ \text{cm}$ of a circle of radius $2.5\ \text{cm}$. The tangents at $P$ and $Q$ intersect at a point $T$. Find the length of $TP$.