The correct answer is option 3, Gandhara art. During the Kushan Period, from the 1st to the 3rd century CE, there was a significant cultural exchange between India and the Greco-Bactrian region. This resulted in the development of a unique art style that combined elements of Indian and Greek art. This art style, known as Gandhara art, was primarily centered in the area of Gandhara, which is present-day Pakistan and Afghanistan. Gandhara art is characterized by its depiction of Buddhist and Hindu religious figures in a realistic and naturalistic manner, with influences from the Hellenistic art of the Greeks. The sculptures and reliefs created during this period are highly regarded for their intricate detailing and stylistic fusion.