Blue bag contents are disposed by autoclaving/microwaving/chemical treatment and destruction shedding. Yellow bag contains category No. 1, 2, 3, & 6 wastes. Category No 1 contains human anatomical waste (option a is correct) Red bags are used for disposal of microbiology waste from laboratory cultures, stocks of microorganisms etc (Cat -3) and hence may be a source of contamination. Black bag contains category No 5, 9 and 10 wastes. Category 9 contains incineration ash which is disposed in multiple landfill (option c is correct.)