He was a great emperor during Kushan dynasty:

Question

Accepted Answer

The correct option is 3:
Kanishka was undeniably the greatest and most influential ruler of the Kushan dynasty, which flourished primarily from the 1st to the 3rd century CE. His reign, often placed around 127–151 CE, marked the zenith of the Kushan Empire, which spanned vast territories from Central Asia to northern India. Kanishka is celebrated for his military conquests, his efficient administration, and most importantly, his fervent patronage of Mahayana Buddhism. He is credited with convening the Fourth Buddhist Council in Kashmir, which significantly formalized and spread Buddhist teachings, and his support fostered the iconic Greco-Buddhist Gandhara and indigenous Mathura schools of art.

The incorrect option is 1:
Buddha, or Siddhartha Gautama, was the founder of Buddhism, a spiritual teacher, not a political emperor of any dynasty. He lived much earlier, typically dated to the 6th–5th century BCE, centuries before the Kushan dynasty was established. Although Kanishka was a devout follower and patron of his teachings, the Buddha was not a Kushan ruler.

The incorrect option is 2:
Ashoka was unquestionably a great emperor, but he belonged to the Maurya dynasty, which ruled from the 3rd century BCE, centuries before the Kushans. Ashoka's empire covered nearly all of the Indian subcontinent and he is famous for promoting Buddhism after the Kalinga War. Thus, while he was a key figure in Indian history and Buddhism, he was from a different and earlier royal lineage.

The incorrect option is 4:
Narasimhavarman (referring to Narasimhavarman I or II) was a renowned king of the Pallava dynasty. The Pallava Empire was a powerful force in South India (Tamil Nadu) primarily during the 7th and 8th centuries CE. His era is celebrated for monumental architecture like the rock-cut temples at Mahabalipuram. This places him geographically in a different region and chronologically much later than the Kushan dynasty.