The correct answer to the question "Who discovered the sea route to India?" is Vasco-da-gama, option 1. Vasco-da-gama was a Portuguese explorer who successfully found the sea route from Europe to India in 1498. He was the first European to reach India by sailing around the Cape of Good Hope, which is located on the southern tip of Africa. This discovery opened up a direct trade route between Europe and India, bypassing the overland routes that were previously used. Vasco-da-gama`s successful exploration played a crucial role in establishing Portuguese colonial rule in India and helped in the expansion of European commerce and influence in the Indian Ocean region.