Which one of the following statements is correct ?

Options

A. Heroin accelerates body functions
B. Malignant tumours may exhibit metastasis
C. Patients who have undergone surgery are given cannabinoids to relieve pain
D. Benign tumours show the property of metastasis

Answer

To determine which statement is correct among the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze Statement A: "Heroin accelerates body function."**
- Heroin is classified as an opioid drug, which is known to have depressant effects on the central nervous system. This means it slows down body functions rather than accelerating them.
- **Conclusion:** This statement is incorrect.

2. **Analyze Statement B: "Malignant tumors may exhibit metastasis."**
- Tumors can be classified into two types: benign and malignant. Benign tumors remain localized and do not spread, while malignant tumors can invade nearby tissues and spread to other parts of the body through a process known as metastasis.
- **Conclusion:** This statement is correct.

3. **Analyze Statement C: "Patients who have undergone surgery are given cannabinoids to relieve pain."**
- Cannabinoids can affect the cardiovascular system and may not be suitable for pain relief in post-surgical patients. Instead, opioids like morphine are typically used for pain management after surgery.
- **Conclusion:** This statement is incorrect.

4. **Analyze Statement D: "Benign tumors show the property of metastasis."**
- Benign tumors do not have the ability to metastasize; they remain at their original site and do not invade other tissues.
- **Conclusion:** This statement is incorrect.

### Final Conclusion:
The only correct statement among the options is **Statement B: "Malignant tumors may exhibit metastasis."**

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