Step 1: Biomedical waste is colour-coded for safe segregation and disposal.
Step 2: Yellow bag (category) holds human anatomical waste, soiled waste and other items meant for incineration, so statement A is true.
Step 3: Red bag holds contaminated recyclable plastic waste such as tubing, catheters and IV sets, which are infectious; hence its contents can be a potential source of infection, so statement B is true.
Step 4: Black bags are used for general and discarded chemical or incineration ash type waste, so statement C is acceptable as true in this context.
Step 5: Blue bag (or white/blue container) is used for broken or discarded glassware and metallic implants, which are disinfected and recycled, NOT disposed in a secure landfill. Therefore statement D is false.
Conclusion: The exception is option D. The printed answer key (D. Blue bag contents are disposed in secure landfill) is correct.