Option 1 states that the Champaran region had a long tradition of anti-planter discontent and agitation. This means that the people in Champaran had a history of being unsatisfied with plantation owners and had been involved in protests against them. This statement is correct and aligns with historical accounts of the region.

Option 2 states that Mahatma Gandhi gave all India publicity to the grievances of Champaran cultivators. This means that Gandhi brought attention to the issues faced by the cultivators of Champaran on a national scale. This statement is correct as Gandhi`s involvement in the Champaran Satyagraha brought national attention to the injustices faced by the cultivators.

Option 3 states that the cultivators of Champaran had protested against excessive taxation on sugar. This means that the farmers in Champaran had specifically protested against the high taxes imposed on the production of sugar. This statement is correct as one of the main grievances of the Champaran cultivators was the excessive taxation on the production of indigo, which was a cash crop used to make indigo dye.

In conclusion, options 1 and 2 are correct while option 3 is incorrect. The correct answer is option 2.