Who became the Nawab of Bengal in 1756 after the death of Alivardi Khan ?

Siraj Ud Daulah

The correct answer is Option 1 -Siraj Ud Daulah

Siraj-ud-Daulah became the Nawab of Bengal in 1756 after the death of Alivardi Khan.

Siraj-ud-Daulah was the last independent Nawab of Bengal. He was defeated by the British East India Company at the Battle of Plassey in 1757, which marked the beginning of British rule in India.