The correct answer is option 'B' - Indian Soldiers Mutiny at Vellore (1806).

Explanation:
The Indian Soldiers Mutiny at Vellore in 1806 was one of the earliest and best-known mutinies before the Revolt of 1857. This mutiny took place at Vellore Fort in Tamil Nadu, India.

Causes of the Mutiny:
1. Discontent among Sepoys: The sepoys (Indian soldiers) were unhappy with certain changes introduced by the British East India Company. These changes included the introduction of new uniforms and headgear, which were seen as a violation of religious beliefs.

2. Disrespect for Indian customs: The British officers showed a lack of understanding and respect for Indian customs and traditions. This further fueled the discontent among the sepoys.

3. Recruitment policies: The British started recruiting soldiers from different regions, which led to a mix of soldiers from different backgrounds and cultures. This created a sense of insecurity and distrust among the sepoys.

Events of the Mutiny:
1. Planning and Preparation: A group of sepoys, led by the sons of the late Marquess of Wellesley, planned the mutiny. They secretly gathered weapons and enlisted the support of other discontented sepoys.

2. Attack on British Officers: On the night of July 10, 1806, the mutineers launched their attack on the British officers. They killed or wounded many of them, including Colonel St. John Fancourt and Colonel Robert Gillespie.

3. Capture of Vellore Fort: The mutineers then captured Vellore Fort and raised the flag of the Mysore Sultanate, symbolizing their rebellion against British rule.

4. British Counterattack: The mutiny was swiftly suppressed by the British forces. The British army, under the leadership of Colonel Gillespie, launched a counterattack and recaptured the fort.

5. Punishment: After the recapture of the fort, the mutineers were severely punished. Many were executed, and others were imprisoned or court-martialed.

Significance of the Mutiny:
The Indian Soldiers Mutiny at Vellore highlighted the growing discontent among the Indian sepoys towards the British rule. It served as an early warning sign for the British about the potential for larger rebellions in the future. The mutiny also brought to light the need for the British to understand and respect Indian customs and traditions to maintain peace and harmony within the Indian army.