Correct Answer: a - (iii), b - (i), c - (iv), d - (ii)

Solution : The correct options are a - (iii), b - (i), c - (iv), and d - (ii).

The Kalahari Desert is a vast semi-arid sandy savanna in Southern Africa that covers a considerable portion of Botswana, as well as areas of Namibia, and South Africa. It has an area of approx 900,000 square kilometres. South America's Pacific coast is home to the Atacama Desert plateau a 1600 km wide region of land west of the Andes Mountains. The 200,000 square KIlometre Thar Desert, commonly referred to as the Great Indian Desert is located in the northwest of the Indian subcontinent. The largest desert in Australia, Great Victoria is made up of numerous small sandhills, grassland plains, and salt lakes.