The correct answer is: B. 12th March, 1930.
Salt Satyagraha, also known as the Salt March, was a major nonviolent protest campaign in India led by Mahatma Gandhi against the British salt monopoly. The campaign lasted for 24 days, from 12 March to 6 April 1930, and culminated in Gandhi’s arrest. The Salt Satyagraha was a major turning point in the Indian independence movement, and it helped to galvanize support for Gandhi’s nonviolent methods of protest.
The British government had a monopoly on the production of salt in India, and they taxed it heavily. This made salt very expensive for ordinary Indians, and it was a major source of revenue for the British government. Gandhi believed that the salt tax was an unjust burden on the Indian people, and he decided to lead a protest against it.
On 12 March 1930, Gandhi and his followers marched to the coastal town of Dandi, where they made salt from seawater in defiance of the British law. This act of defiance sparked a nationwide movement of nonviolent protests against the British salt monopoly. The Salt Satyagraha was a major success, and it helped to bring about the end of British rule in India.
The other options are incorrect because they are not the dates on which the Salt Satyagraha was started.