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The difference between a level line and a horizontal line is that | |
A. | level line is a curved line while hori-zontal line is a straight line [Correct Answer] |
B. | level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line [Wrong Answer] |
C. | horizontal line is normal to plumb line while level line may not be normal to the plumb line [Wrong Answer] |
D. | both are same [Wrong Answer] |