Chemotherapy is

Options

A. Use of heat for therapeutic effect
B. Use of chemical for therapeutic effect
C. Use of natural reagent for therapeutic effect
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Chemotherapy":**
- The term "chemotherapy" can be broken down into two parts: "chemo" which refers to chemicals, and "therapy" which refers to treatment or therapeutic effect. This indicates that chemotherapy involves the use of chemicals for treatment purposes.

2. **Identifying the Purpose of Chemotherapy:**
- Chemotherapy is primarily known as a treatment for cancer. It involves the use of chemical substances or drugs that specifically target and kill cancer cells in the body.

3. **Recognizing the Types of Agents Used:**
- Various chemical agents are utilized in chemotherapy, including specific anti-cancer drugs. Some examples of these drugs include mechlorethamine, melflufen, and ifosfamide. These substances are often derivatives of mustard gas and are designed to effectively combat cancer cells.

4. **Evaluating the Options:**
- Given the options presented:
- a) Use of heat for therapeutic effect
- b) Use of chemicals for therapeutic effect
- c) Use of natural reagent for therapeutic effect
- d) All of these
- We can conclude that the correct option is (b) as chemotherapy specifically involves the use of chemicals for therapeutic purposes, particularly in the treatment of cancer.

5. **Final Conclusion:**
- Therefore, the correct answer to the question "Chemotherapy is" is: **Use of chemicals for therapeutic effect.**

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