Soln:
● Durand Line is the international land border that stretches for about 1,600 miles (2,600 km) between Afghanistan and Pakistan. Hence, option D is correct.
● It was established in 1893 as the border between British India and the Emirate of Afghanistan, marking their respective spheres of influence.
● It is named for Sir Henry Mortimer Durand, the foreign secretary of British India, who induced Abdur Rahman Khan, the emir of Afghanistan, to agree to an international boundary.
● This line is not accepted by Afghanistan at present. It says that the line splits many native Pashtun families residing in the region for centuries. Of late, this has caused tensions between Pakistan and Afghanistan.