The correct option is (b) II, III, I and IV — Defeat of Napoleon (1814–15), Unification of Italy (1859–70), Treaty of Constantinople, Unification of Germany (1866–71).
Wait — let me recheck. The source lists: Fall of Napoleon (1814–15), Unification of Italy (1859–70), Unification of Germany (1866–71). The Treaty of Constantinople (1832, ending the Greek war of independence) fits between Napoleon's defeat and Italian unification. So the correct chronological order is: II (1814–15) → I (1832) → III (1859–70) → IV (1866–71), which matches option (c) II, I, IV and III.
The correct answer is (c) II, I, IV and III.
Key dates to memorise from the timeline in Chapter 1: Napoleon's fall = 1814–15; Treaty of Constantinople (Greek independence) = 1832; Unification of Italy = 1859–70; Unification of Germany = 1866–71. Arranging these gives option (c). Examiners expect students to know these landmark dates precisely.