Which of the following dispute made Gandhi ji to undertake a fast for the first time?

Q. Which of the following dispute made Gandhi ji to undertake a fast for the first time?
Answer: Ahmedabad Mill Strike
Notes: Gandhiji undertook a hunger strike for the first time during the Ahmedabad Mill Strike in 1918. The mill workers started agitation for the plague bonus. After consultation with Gandhiji they demanded wage hike. Later the Mill owners increased the wage of the workers by 35%.