The correct answer is (b) Kanishka.
Kanishka was a Kushan emperor who ruled over a vast empire in Central Asia and the Indian subcontinent from the early 2nd century CE. He was a major patron of Buddhism and is credited with spreading the religion throughout his empire.
Kanishka’s coins are some of the most important archaeological evidence of his reign. They depict a variety of Buddhist symbols, including the Buddha himself. The coins are also inscribed with Buddhist texts, which provide valuable insights into the religion during Kanishka’s time.
The other options are incorrect. Wima Kadphises was a Kushan emperor who ruled before Kanishka. Nahapana was a Satavahana king who ruled in the Deccan region of India at the same time as Kanishka. Budh Gupta was a Gupta emperor who ruled in the 5th century CE, several centuries after Kanishka.
In conclusion, the correct answer to the question “Budha is depicted on the coins of” is (b) Kanishka.