The correct answer is (b). The All India Trade Union Congress (AITUC) was established in 1919. It is the oldest trade union federation in India. The AITUC was formed by a group of trade unionists who were inspired by the Russian Revolution of 1917. The AITUC’s goal is to improve the working conditions and wages of workers in India. The AITUC has been involved in a number of strikes and protests over the years. The AITUC is a member of the International Trade Union Confederation (ITUC).
Option (a) is incorrect because the AITUC was established in 1919, not 1920.
Option (c) is incorrect because the AITUC was established in 1919, not 1922.
Option (d) is incorrect because the AITUC was established in 1919, not 1924.