Correct option is A
Manhole: It is an opening constructed on the alignment of a sewer for facilitating a person access to the sewer for the purpose of inspection, testing, cleaning and removal of obstruction from the sewer line.
Lamp holes: It is also known as fresh air inlet. It is vertical pipe extended from surface to ground surface of a sever. It is used to check the obstructions in sewer.
Cleanouts: It is an inclined pipe extended from ground surface and connected to the underground sewer through which sewer will be cleaned.
Catch basins: It is provide as a street inlet to collect grit, sand debris etc.
