The correct answer is option 3, Kanishka. Kanishka was a prominent Indian emperor who ruled over the Kushan Empire in the 2nd century AD. He is often referred to as the ‘Second Ashoka’ because like Ashoka, he played a crucial role in the spread of Buddhism. Kanishka is known for his patronage and support of Buddhism, just like Ashoka, who was the first Indian emperor to embrace and promote Buddhism. Kanishka also convened the Fourth Buddhist Council, which brought together Buddhist scholars from different regions to compile and revise Buddhist scriptures. Additionally, he contributed to the development of Gandhara art and the flourishing of the Silk Road trade route. Overall, Kanishka`s achievements and influence have earned him the title of the `Second Ashoka`.