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Q. |
Which of the following statement is wrong? |
A. | The impermeable groynes do not permit any flow through them. |
B. | The impermeable groynes may be constructed by a core of locally available material like sand, clay and gravel. |
C. | The permeable groynes dampen the velocity and reduce the erosive action of the stream. |
D. | none of the above |
Answer» D. none of the above |
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