Explanation:

• Here is an explanation for each option:
• - Option 1: The Champaran Satyagraha
• - This was Gandhi's first satyagraha in India, taking place in 1917. It focused on the plight of indigo farmers.
• - Option 2: Publicly violating Salt Law at Dandi. - Gandhi made the statement during this time, expressing his discontent with British policies.
• - Gandhi led the Salt March in 1930, symbolically breaking the British salt monopoly.
• - Correct Answer: Option 3: Attending the Second Round Table Conference in London. However, this event is not associated with the statement "Sedition has become my religion."
• - Option 4: The launch of the Quit India Movement
• - The Quit India Movement was a 1942 civil disobedience movement for independence, unrelated to the statement in question.