<prompt> Which of the following can be reliably used for hand washing -ChlorhexidineIsopropyl alcoholGlutaraldehydeCresol  <response>: Chlorhexidine hibitane is a relatively non toxic skin antiseptic ; most active againstgram positive organisms and fairly against gram negative ones. REF:Ananthanarayan Panickers Textbook of Microbiology 9th edition pg no:35 