Study the given statement with respect to sewer appurtenances used in a sewerage system and select the correct answer.
Statement A : A lamp hole may be located when there is change in the direction or gradient of the sewer in between two closely spaced manholes.
Statement B : Flushing tanks will be constructed when there is a a steeper downward gradient along the alignment of sewer line.
1
Both the statements are incorrect
2
Statement A is correct, but B is incorrect
3
Both the Statements are correct
4
Statement B is correct, but A is incorrect