Contour interval is
(A) The vertical distance between two consecutive contours
(B) The horizontal distance between two consecutive contours
(C) The vertical distance between two points on same contour
(D) The horizontal distance between two points on same contour
(A) The vertical distance between two consecutive contours
(B) The horizontal distance between two consecutive contours
(C) The vertical distance between two points on same contour
(D) The horizontal distance between two points on same contour