Correct answer: B. Pataliputra
Explanation: Direct answer: Option B, Pataliputra, is correct. The Mauryan Empire was a major ancient Indian empire, and its central administrative capital was Pataliputra, generally identified with present-day Patna in Bihar. From this important city, Mauryan rulers administered a large territory through officials, provinces and communication routes. Option B is correct because Pataliputra is the standard capital associated with Mauryan administration. Option A, Kannauj, became important in later periods and is not the usual answer for the Mauryan capital. Option C, Ujjain, was an important Mauryan centre and provincial headquarters, but it was not the main imperial capital asked here. Option D, Ayodhya, is an ancient and important city, but it was not the central capital of the Mauryan Empire. Exam cue: when the question pairs “Mauryan Empire” with “capital,” recall Pataliputra. Do not confuse an important provincial centre with the empire’s main capital.