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If y coordinate of a point is zero,then this point always lies

(a) in I quadrant (b ) in II quadrant
(c)on x- axis (c) on y- axis

with reason


The answer is (C) X-axis
Isn't it obvious... there is no Y coordinate that is the Y coordinate is zero. So the point only has X-coordinate and all X-coordinates are marked with the basis of X-axis.
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If y coordinate of a point is zero, then this point always lies on x-axis.
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