The correct answer is option 1, Sirajuddaula and Robert Clive. The Battle of Plassey was a significant battle that took place on June 23, 1757, in present-day West Bengal, India. This battle was a significant turning point in the history of British colonial rule in India. Sirajuddaula was the Nawab of Bengal, while Robert Clive was a British officer representing the East India Company. The battle resulted in a decisive victory for the British East India Company, mainly due to the betrayal of Sirajuddaula`s commander-in-chief, Mir Jafar. This victory allowed the British to establish their control over Bengal and laid the foundation for their future dominance over the Indian subcontinent. Mir Kasim, mentioned in option 3, was a later opponent of the British in the Battle of Buxar.