A) By head ward erosion of a group of cirque on a mountain peak
B) When two or more valley glaciers merge to form a much larger glacier
C) As till is modified by floods of glacier melt water
D) When a continental glacier freezes to its underlying surface and ceases moving
Correct Answer: A
Solution :[a] A pyramidal peak, sometimes in its most extreme form called a glacial horn, is an angular, sharply-pointed mountain peak which results from the cirque erosion due to multiple glaciers diverging from a central point.
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