AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) Only Sardinia-Piedmont was ruled by an Italian princely house; the rest were under foreign powers including Austrian Habsburgs, the Pope, and Spanish Bourbon kings.
Source: Italy Unified, Chapter 1 (The Making of Nationalism in Europe)
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The textbook states that Cavour led Sardinia-Piedmont (the only Italian-ruled state) to defeat Austrian forces, while Garibaldi drove out the Spanish rulers from South Italy/Kingdom of the Two Sicilies, and the Papal States remained under the Pope until 1870. This directly matches option B. Avoid option D — the Habsburgs controlled only the north (Lombardy/Venetia), not the entire peninsula.