UPSC CSE Prelims 2005
The correct sequence of continents in decreasing order of their land area is Africa, North America, South America, and Europe.
The approximate land areas of these continents are:
Based on these figures, the correct decreasing order of land area is Africa > North America > South America > Europe.
Option (a) is incorrect because it places North America before Africa. Africa is larger than North America in terms of land area.
Options (c) and (d) are incorrect as they misrepresent the relative sizes of Europe and South America. South America has a significantly larger land area than Europe.