<prompt> Feature of slow filter w.r.t. fast filter isare : a Occupies less spaceb Highly skilled operationc Poor bacterial qualityd Takes more time for purificatione Size of sand is smallerdebccdbd  <response>: Slow sand filter occupies large area more space.Slow and filter requires less skilled operation.Slow sand filter removes more bacteria and has better bacterial control 99.9-99.99Slow sand filter requires longer duration for purification.Size of sand is smaller 0.2-0.3 mm. 