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Question
The gridiron pipe drainage system is more economical than the herringbone pipe drainage system because
Options:
A .  it is adopted in the fields which do not require complete drainage
B .  the number of main or sub-main lines is reduced
C .  the number of junctions and the double-drained area are reduced
D .  it has only main or sub-main lines
Answer: Option C


-NA-



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