Pick up the incorrect statement regarding a master trap from the following :

[A].	It is provided in between the lower end of the house drain and the street sewer
[B].	It is provided a cleaning eye at the top of the trap
[C].	The height of fresh air inlet pipe fixed vertically with wall is 3 m
[D].	The mica flap valve which opens inwards only, is fitted at the top of the inlet pipe
[E].	The water seal is less than that of ordinary traps.

Answer: Option E

Explanation:

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