The correct option is (B) I, II, IV and III
(Swaraj Party–1923, Lahore Session–1929, Depressed Class Association–1930, Gandhi-Irwin Pact–1931).
The chronological order is: Swaraj Party (1923) → Lahore Congress Session (1929) → Depressed Class Association (1930) → Gandhi-Irwin Pact (1931). The textbook mentions Swaraj Party formation after the withdrawal of NCM (1922), and the Lahore Session formalising Purna Swaraj in December 1929. Gandhi-Irwin Pact followed the Civil Disobedience Movement in 1931.