The verified answer to “Important Battles question: The Kalinga War (261 BCE) was fought by which Mauryan emperor?” is Ashoka, option C. The source-backed, question-specific record explains: Emperor Ashoka of the Maurya dynasty fought the Kalinga War in 261 BCE against the kingdom of Kalinga (modern Odisha). The immense bloodshed (approximately 100,000 killed and 150,000 deported) transformed Ashoka into a follower of Buddhism. This evidence establishes the historical relationship required in this Important Battles item. Option C gives Ashoka and satisfies every condition stated in the question. The remaining choices—Chandragupta Maurya, Bindusara and Brihadratha—do not satisfy the complete requirement. Replaying that method for this Important Battles question confirms Ashoka without relying on option position.