The correct options are
B The AITUC represented only the interests of railway workers
D The AITUC was backed by the government
In 1899, railway workers went on strike for their demands. The workers did not have any well-known formal organisation to support their voice until 1920 when the All India Trade Union Congress was formed. A trade union is an organisation that represents the best interests of the workers, indpendent of government and might sometimes protest against government policies too.