The correct answer is Gandhiji .

The Rowlatt Act was a law passed by the British colonial government in India in 1919, which gave the government sweeping powers to arrest and detain people without trial. The Act was widely opposed by Indians, who saw it as a violation of their civil liberties and an attempt to suppress their growing movement for independence.

To protest against the Rowlatt Act, Mahatma Gandhi suggested launching a nationwide campaign of non-cooperation, which included boycotting British goods and institutions, and launching a no-tax campaign. The no-tax campaign was a form of civil disobedience, where people refused to pay taxes to the government as a sign of protest against the unjust laws.

Gandhi believed that the no-tax campaign would be a powerful tool for non-violent resistance and would demonstrate the people’s unity and determination in their fight for freedom. The campaign was launched on a large scale in various parts of the country and was successful in mobilizing public opinion against the British government.

The no-tax campaign was just one of the many non-violent methods used by Gandhi and other leaders of the Indian National Congress in their struggle for independence. Through these peaceful means, they were able to awaken the consciousness of the masses and inspire a whole generation of Indians to fight for their rights and freedom.

In conclusion, it was Mahatma Gandhi who suggested the launching of the no-tax campaign as a form of protest against the Rowlatt Act. This campaign was a powerful tool of non-violent resistance and played a significant role in India’s struggle for independence.