The correct answer is: B. Theog
The first tragic incident of firing the Satyagrahis took place in Theog, Himachal Pradesh on 4th April 1930. The incident took place when the British police opened fire on a group of unarmed Satyagrahis who were protesting against the salt monopoly. The firing resulted in the death of 13 people and injured many others.
The incident was a major turning point in the Indian independence movement. It led to a wave of protests and demonstrations across the country. The British government was forced to make concessions to the Indian nationalists.
The incident also had a significant impact on the people of Himachal Pradesh. It inspired them to join the freedom struggle and fight for their rights. The incident is still remembered today as a symbol of the sacrifices made by the people of Himachal Pradesh in the fight for independence.
The other options are incorrect because they are not the places where the first tragic incident of firing the Satyagrahis took place.