Which of the following characteristic features may be used while plotting a contour plan ?1. Two contour lines having the same elevation cannot unite the continue as one line.2. Contour lines closed together indicate a gentle slope.3. Contour lines cross a valley line at right angles.Select the correct answer using the codes given below:

Which of the following characteristic features may be used while plott

1.	Which of the following characteristic features may be used while plotting a contour plan ?1. Two contour lines having the same elevation cannot unite the continue as one line.2. Contour lines closed together indicate a gentle slope.3. Contour lines cross a valley line at right angles.Select the correct answer using the codes given below:
A.	1, 2 and 3
B.	1 and 2
C.	2 and 3
D.	1 and 3
Answer» E.

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