The correct answer is Anusaya Sarabhai. Explanation & Key Takeaways: • Anusaya Sarabhai was a key female collaborator of Mahatma Gandhi during the struggle of mill workers in Ahmedabad. • She worked closely with Gandhi in the labor movement and is often referred to as the "Mother of the Trade Union Movement" in India. • The Ahmedabad Mill Strike of 1918 was one of the first organized labor movements in India, where Gandhi and Anusaya Sarabhai played pivotal roles in securing fair wages for workers. Related Concepts: • Other notable women associated with Gandhi include Sarojini Naidu, who contributed to the freedom struggle, and Kasturba Gandhi, who supported Gandhi in various movements but was not directly involved in the Ahmedabad Mill Strike. • Aruna Asaf Ali was a freedom fighter known for her role in the Quit India Movement, not the Ahmedabad labor movement.