Arrange the following developments that took place in the trade union movement in India from the earliest to the latest.  1. Formation of AITUC.  2. Formation of Indian Trade Union Federation  3. Formation of Red Trade Union Congress. 

Formation of AITUC – 1920 The All India Trade Union Congress (AITUC) was the first national-level trade union organization in India, formed in 1920. Formation of Indian Trade Union Federation – 1929 The Indian Trade Union Federation (ITUF) was formed in 1929 as a rival organization, mainly supported by moderates. Formation of Red Trade Union Congress – 1931 The Red Trade Union Congress (RTUC) was formed in 1931 by the communist faction after splitting from AITUC. Correct Chronological Order (Earliest → Latest): AITUC (1920) → ITUF (1929) → RTUC (1931) Answer: B. 1, 2 and 3