The correct answer is (d). Satvahan.
The Satavahanas were a dynasty that ruled over the Deccan region of India from the 2nd century BCE to the 3rd century CE. They were a powerful and influential dynasty, and their rule saw a period of great cultural and economic prosperity in the Deccan. However, they are not mentioned in the Ashokan inscriptions.
The Ashokan inscriptions are a series of edicts and rock carvings that were commissioned by the Mauryan emperor Ashoka in the 3rd century BCE. The inscriptions are found all over the Indian subcontinent, and they provide a valuable source of information about Ashoka’s reign and the history of India at that time. However, the Satavahanas are not mentioned in any of the Ashokan inscriptions.
This is likely because the Satavahanas were not a major power at the time that Ashoka was ruling. The Satavahanas only came to power in the 2nd century BCE, after Ashoka’s death. It is also possible that the Satavahanas were not considered to be a threat to Ashoka’s empire, and therefore were not mentioned in his inscriptions.
Whatever the reason, the fact that the Satavahanas are not mentioned in the Ashokan inscriptions is a significant omission. It suggests that the Satavahanas were not a major power at the time of Ashoka’s reign, and that they did not pose a threat to his empire.