<prompt> Drinking water is best made free of cyclops by -FiltrationBoilingChlorinationNone of the above  <response>: Chlorine destroys Cyclops and larvae of guinea worms in a strength of 5 ppm. This high concentration of Chlorine gives an objectionable smell and taste to drinking water REFERENCE: PARKS TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE, 25TH EDITION, PG NO. 842 