Correct option is C
Characteristics of contours
All points lying on one contour have the same elevation.
A contour will always close on itself either within or beyond the limits of the map.
A contour closing within the limits of the map indicates either summit or a depression.
Contours can not interact or cross each other.
The contours are spaced equally on a uniform slope.
Contours cross the ridge line at right angles.
The curve of a contour in a valley is convex toward the stream.
A single contour cannot split into two contour lines.
Two contour lines having the same elevation can not unite and continue as one line, a single contour can not split into two lines. This is evident because a single line could, otherwise, indicate a knife-edge ridge or depression which not occur in nature
