**Core Concept**
The disposal of cytotoxic medicines is crucial to prevent environmental contamination and minimize the risk of exposure to healthcare workers. This involves adhering to specific guidelines for handling, storage, and disposal of hazardous waste, including cytotoxic agents.

**Why the Correct Answer is Right**
Cytotoxic medicines, such as chemotherapy agents, are highly toxic and pose significant risks to the environment and human health if not disposed of properly. The correct disposal method involves incineration, which breaks down the chemical structure of these agents, rendering them non-hazardous. This process is typically carried out in a controlled environment, such as a medical waste incinerator. The disposal of cytotoxic medicines through incineration prevents environmental contamination and minimizes the risk of exposure to healthcare workers.

**Why Each Wrong Option is Incorrect**
**Option A:** Landfill disposal is not an appropriate method for disposing of cytotoxic medicines, as these agents can leach into soil and groundwater, causing environmental contamination.
**Option B:** Recycling cytotoxic medicines is not a feasible option, as these agents are highly toxic and cannot be reused or repurposed.
**Option C:** Disposal through the municipal sewer system is not a suitable method, as cytotoxic agents can contaminate waterways and pose risks to aquatic life.

**Clinical Pearl / High-Yield Fact**
When disposing of cytotoxic medicines, it is essential to follow the "P-92" guidelines, which emphasize the importance of proper handling, storage, and disposal of hazardous waste, including cytotoxic agents.

**Correct Answer: C. Incineration**