Concept:The last ruler of the Mauryan Empire was Brihadratha, who was assassinated by his own general.Explanation:The Mauryan Empire was founded by Chandragupta Maurya around 322–321 BCE. It saw great rulers like Bindusara and Ashoka. The last king was Brihadratha, who ruled from 187 to 185 BCE. He was killed by his commander-in-chief, Pushyamitra Shunga. Pushyamitra then started the Shunga Empire. Brihadratha succeeded Shatadhanvan, who ruled between 195 and 187 BCE. Thus, the Mauryan dynasty came to an end in 185 BCE.Answer:D. Brihadratha