Unused syringe needles are disposed in which of the following?

Plastic wrappers of surgical syringes are disposed in black bags. Discarded drugs, incinerator ash, food and paper waste are also put in the black bags. Blue bags for used and unused sharps. It may also contain solid disposable wastes. Red bags for microbiology/biotechnology waste, contaminated solid waste, syringes, IV sets, urobags, blood bags, gloves, catheters etc. Yellow bag for human tissues, organs, body pas, microbiology cultures, stocks and vaccines, human and animal cell cultures, contaminated wastes like cotton, dressing, plaster casts, linens, beddings, and other such material contaminated with blood or body fluids.