The correct answer to the question is option 3, Portuguese. Bahadur Shah, the ruler of Gujarat, was killed in a conflict with the Portuguese. During the 16th century, the Portuguese had established themselves as a major maritime power and had a significant presence in the Indian Ocean. They sought to control trade routes and establish trading posts in India. Gujarat was an important region for trade, and the Portuguese had conflicts with local rulers, including Bahadur Shah. The Portuguese eventually managed to establish control over some parts of Gujarat, including the important port city of Diu. This conflict with the Portuguese ultimately led to the downfall and death of Bahadur Shah. It is important to note that while the Dutch, English, and French were also involved in the trade and conflicts in India during this time, they were not directly responsible for the death of Bahadur Shah.