The landform ‘Barkhan’ is formed by :-

Wind
Running water
Glacier
None of the above

The correct answer is (a). Barkhan is a type of sand dune that is formed by wind. It is crescent-shaped, with the tips pointing downwind. Barkhan dunes are common in deserts and other areas with strong winds.

(b) Running water can form a variety of landforms, including river valleys, deltas, and waterfalls.

(c) Glaciers can form a variety of landforms, including moraines, cirques, and fjords.

(d) None of the above is correct.