Assertion: ploughing along the contour lines decelarate the flow of water down a slope and controls soil erosion
Reason: soil erosion is the washing away of top layer of soil or denudation of soil cover..
A) if both assertion and reason are true and reason is the correct explanation of assertion
B) if assertion and reason are true and reason is not the correct explanation of assertion.
C) if assertion is true but reason is false
D) if both the assertion and reason are false..