Explanations:Sirajuddaulah, also known as Siraj-ud-Daulah, was the last independent Nawab of Bengal, ruling from 1756 to 1757. His reign is significant in the context of the British East India Company's expansion in India. The year 1756 marks the beginning of his rule, which was characterized by his efforts to assert his authority over the British and other European powers operating in Bengal.
The year 1756 is particularly notable because it was during this time that Sirajuddaulah took action against the British East India Company, leading to the Black Hole of Calcutta incident. This event, although its historical accuracy is debated, is often cited as a catalyst for the British to seek retribution, which culminated in the Battle of Plassey in 1757. The Battle of Plassey resulted in Sirajuddaulah's defeat and the establishment of British control over Bengal, marking a significant turning point in the history of British colonialism in India.
Understanding the historical context of Sirajuddaulah's rule is crucial for comprehending the broader narrative of British colonial expansion in India. The year 1756 is a pivotal date in this context, as it represents the beginning of a series of events that would lead to the consolidation of British power in the region. It is important to note that the dates of other significant historical events, such as the founding of the Indian National Congress in 1885, are not relevant to the specific question of when Sirajuddaulah became the Nawab of Bengal.
Therefore, the correct answer is 1756, as it accurately reflects the year Sirajuddaulah ascended to the position of Nawab of Bengal, initiating a period of conflict and eventual British dominance in the region.