The British began exploring and mapping the regions of Arunachal Pradesh in the:

The correct answer is: d) 19th century.

The British began exploring and mapping the regions of Arunachal Pradesh in the 19th century. The first British expedition to Arunachal Pradesh was led by Captain Frederick Young in 1839. Young’s expedition was followed by several other British expeditions, including those led by Captain Henry Strachey in 1849 and Colonel James Forsyth in 1873. The British were interested in exploring and mapping Arunachal Pradesh for several reasons. First, they were interested in the region’s natural resources, such as timber and minerals. Second, they were interested in the region’s strategic location, which could be used to control trade routes between India and China. Third, they were interested in the region’s people, who were known for their fierce independence.

The British exploration and mapping of Arunachal Pradesh had a significant impact on the region. The British introduced new technologies and ideas to the region, and they also established a number of administrative posts. The British also had a significant impact on the region’s people, who were forced to adapt to a new way of life.

The British exploration and mapping of Arunachal Pradesh was a significant event in the history of the region. It marked the beginning of the British Raj in Arunachal Pradesh, and it had a profound impact on the region’s people and culture.

Here is a brief explanation of each option:

• a) 16th century: The British did not begin exploring and mapping the regions of Arunachal Pradesh in the 16th century. The first British expedition to Arunachal Pradesh was led by Captain Frederick Young in 1839.
• b) 17th century: The British did not begin exploring and mapping the regions of Arunachal Pradesh in the 17th century. The first British expedition to Arunachal Pradesh was led by Captain Frederick Young in 1839.
• c) 18th century: The British did not begin exploring and mapping the regions of Arunachal Pradesh in the 18th century. The first British expedition to Arunachal Pradesh was led by Captain Frederick Young in 1839.