The correct option is (b) I, II, III and IV
Napoleonic wars (1797) → Treaty of Vienna (1814-15) → Greek struggle for independence (1821) → Slav nationalism in Ottoman Empire (1905).
The 'Some Important Dates' timeline in Chapter 1 directly gives these years. Students must memorise these key dates as MCQs on chronological order are common. Remember: Napoleon → Vienna → Greece → Slavs.