What was the common demand among the jute workers in Kolkata and workers of the Buckingham and Carnatic Mills in Chennai, and workers from Ahmedabad?

50% increase of wages

The correct answer is Option 3: 50% increase of wages

In the early stages of colonialism, labour was very cheap as the colonial government did not regulate either wages or working conditions. Though trade unions emerged later, workers did protest. Their actions then were, however, more spontaneous than sustained. Some of the nationalist leaders also drew in the workers into the anti-colonial movement. The war led to the expansion of industries in the country but it also brought a great deal of misery to the poor. There were food shortage and sharp increase in prices. In September and October 1917 there were around 30 recorded strikes. Jute workers in Calcutta struck work. In Madras, the workers of Buchingham and Carnatic Mills (Binny’s) struck work demanding increase in wages. Textile workers in Ahmedabad struck work for increase in wages by 50 per cent (Bhowmick 2004).

Note: This question is a bit ambiguous. In the NCERT it is not mentioned that the workers at Calcurtta, Buchingham  and Ahmedabad all were demandind 50% increase in wages. In NCERT it is mentioned that "Textile workers in Ahmedabad struck work for increase in wages by 50 per cent". The correct answer should be increase in wages which is not mentioned in the given options. The answer is given as per NTA answer sheet.