The correct answer is Bardoli Satyagraha. Explanation & Key Takeaways: • Bardoli Satyagraha: • It was the movement started in the state of Gujarat in 1928 against the unjust raising of taxes inland revenue. • It was led by the Sardar Vallabhbhai Patel. • A large number of women took an active part in the movement. It was these women who gave Patel the moniker ‘Sardar’. • After-effects of Bardoli Satyagraha were - • Fearing things could go out of hand, the government set up the Maxwell-Broomfield commission to look into the matter. • The revenue was reduced to 6.03%. • The peasants were returned their confiscated land. • Patel emerged as a national leader after the success of the Bardoli Satyagraha. He showed his remarkable organising skills. • Sardar Vallabhbhai Patel: • He was the first deputy Prime Minister and Home Minister of India. • He was known as the Iron Man. • The Statue of Unity, the world's tallest statue was dedicated to him. • He played an important role in the unification of India. • National Unity Day is observed on his birth date 31st October. • He was awarded Bharat Ratna, the highest civilian award of India in 1991 posthumously.