<prompt> All can be incinerated except -Cytotoxic wasteSharpsAnatomical wasteInfectous waste  <response>: - the sharps including needles and scalpel comes under Category no. 4 and is disposed in blue plastic bag. - it should be disinfected by chemical treatment, autoclaving, microwaving and mutilation shredding. Reference : Parks textbook of preventive and social medicine, 23rd edition, pg no:793 p 