The correct answer is option 3, Arabs. The Arabs were the first to invade India. In the early 8th century, Arab traders started arriving in India for trade purposes. However, over time, some Arab groups turned to raiding and plundering the coastal areas of India. The most significant Arab invasion took place in 712 AD when Muhammad bin Qasim, an Arab general, conquered the Sindh region in present-day Pakistan. This marked the beginning of Arab rule in parts of India. It`s important to note that while other groups like the Afghans, Mongols, and Turks did invade India at later periods, the Arabs were the first to make significant incursions into the subcontinent.