The correct answer is the Indo-Greeks.
The Indo-Greeks were a group of Indo-European peoples who invaded the Indian subcontinent from Bactria (modern-day Afghanistan) in the 2nd century BCE. They were descendants of Alexander the Great’s Greek soldiers who had stayed in the region after his death. The Indo-Greeks ruled over parts of northern India for several centuries, and their culture had a significant impact on the development of Indian art and religion.
The Scythians were a nomadic people from Central Asia who invaded the Indian subcontinent in the 1st century BCE. They were known for their horsemanship and archery, and they ruled over parts of northwestern India for several centuries. The Scythians were eventually absorbed into the local population, but their influence can still be seen in some aspects of Indian culture.
The Parthians were an Iranian people who ruled over a large empire in Central Asia and the Middle East from the 3rd century BCE to the 3rd century CE. They never invaded India, but they did have a significant impact on the region through their trade and cultural contacts.
The Kushanas were an Iranian people who ruled over a large empire in Central Asia and northern India from the 1st century BCE to the 3rd century CE. They were the most powerful foreign power to invade India in the ancient period, and their rule had a profound impact on the development of Indian culture.