Which term refers to the treatment that uses drugs to kill cancer cells?

• A. Immunotherapy
• B. Chemotherapy
• C. Radiation Therapy
• D. Targeted Therapy

Answer: (B)

Chemotherapy refers to treatment with drugs designed to kill cancer cells by interfering with their ability to divide and reproduce. These cytotoxic agents travel through the body, reaching cancer cells systemically, which makes them especially useful for cancers that have spread beyond a single location. The other modalities work through different mechanisms: immunotherapy enhances or leverages the body's immune system to attack cancer cells; radiation therapy uses targeted radiation to damage DNA in cancer cells at a specific site; and targeted therapy blocks specific molecules or pathways that cancer cells depend on for growth. Since the question asks for the term that means using drugs to kill cancer cells, chemotherapy is the best and most precise fit.