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Question
Pick up the correct statement from the following:
Options:
A .  In a gully trap, a water seal of 6 to 7.5 cm is provided
B .  The gully trap collects waste water from the kitchen, sink, wash basins, etc.
C .  The gully trap disconnects the sullage drain from the main drainage system
D .  The grating provided over gully traps is 23 cm square
Answer: Option B

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