Explanation:

Mahatma Gandhi had sound reasons for his decision. An item of daily use could resonate more with all classes of citizens than an abstract demand for greater political rights. The salt tax represented 8.2% of the British Raj tax revenue, and hurt the poorest Indians the most significantly.

Note: (Land Revenue was largest source of revenue of government, and not salt tax) Explaining his choice, Gandhi said, “Next to air and water, salt is perhaps the greatest necessity of life.

• The Dharasana Satyagraha went ahead as planned, with Abbas Tyabji leading the march with Gandhi’s wife Kasturba at his side. Both were arrested before reaching Dharasana and sentenced to three months in prison. After their arrests, the march continued under the leadership of Sarojini Naidu who warned the satyagrahis, “You must not use any violence under any circumstances. You will be beaten, but you must not resist: you must not even raise a hand to ward off blows.” Soldiers began clubbing the satyagrahis with steel tipped lathis in an incident that attracted international attention. As, Tyabji was arrested earlier, so final raid was led by Sarojini Naidu.
• Dandi March was covered widely by International Media, which generated sympathy for Indians in worlds. TIME awarded Mahatma Gandhi as Person of the year in 1930. During March, New York Times, Associated Press, TIME and other covered widely and question British anti-people laws.

Hence only statements 2&3 are correct.