The correct answer is Option2- Siraj-ud-daulah

Siraj-ud-Daulah became the nawab of Bengal after Alivardi Khan died in 1756. He was the last self-governing Nawab of Bengal.

Siraj-ud-Daulah was a capable ruler, but he was also suspicious of the British East India Company. He tried to restrict the Company's activities in Bengal, and he also fortified his capital, Murshidabad.

The British East India Company was alarmed by Siraj-ud-Daulah's actions, and they decided to remove him from power. They conspired with Mir Jafar, the commander of Siraj-ud-Daulah's army, to defeat the Nawab.

In 1757, the British and Mir Jafar's forces defeated Siraj-ud-Daulah at the Battle of Plassey. Siraj-ud-Daulah was captured and killed, and Mir Jafar was installed as the new Nawab of Bengal.