Which of the following was the last king of Mauryan dynasty?

Brihadrath

The correct answer is Option 4- Brihadrath

The last king of the Mauryan dynasty was Brihadrath. He was assassinated by his own general, Pushyamitra Shunga, in 185 BC. Pushyamitra Shunga then founded the Sunga dynasty.

Brihadrath's reign is shrouded in mystery. There is very little information about him in historical sources. It is possible that he was a weak ruler, and that his assassination was the result of a power struggle within the Mauryan Empire.

The Mauryan dynasty was a golden age in Indian history. It was a period of peace, prosperity, and cultural flourishing. However, the empire began to decline after the death of Ashoka. Brihadrath's reign marked the end of the Mauryan dynasty, and the beginning of a new era in Indian history.