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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
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Sushmita
Ridge line or valley line intersects contour at right angle. If the higher values are inside the loop in the contour it indicates a Ridge. If the higher values are outside the loop in the contour it indicates a Valley. And also see the attached diagram for more clarification. [Contour lines are the lines joining the points of equal elevation on the ground surface.] Thus, correct option should be (A)