Wastewater Story

Three statements are provided here which define the terms –
(a) sludge (b) sewage and (c) wastewater. Pick out the correct
definition for each of these terms.
(a) The settled solids that are removed in wastewater
treatment with a scraper.
(b) Water from kitchen used for washing dishes.
(c) Wastewater released from homes, industries, hospitals
and other public buildings.