Select the correct statement from the ones given below.

Options

A. barbiturates when give to criminals make them tell the truth
B. morphine is often given to person who have undergone surgery as a pain killer
C. chewing tobacco lowers blood pressure and heart rate
D. cocaine is given to patients after surgery as it stimulates recovery.

Answer

To solve the question of selecting the correct statement from the options provided, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Evaluate the First Statement:**
- **Statement:** "Barbiturates when given to criminals make them tell the truth."
- **Analysis:** Barbiturates are sedative-hypnotic drugs that induce sleepiness and relaxation. They do not compel individuals to tell the truth. In fact, they can be dangerous in high doses and can lead to death.
- **Conclusion:** This statement is **incorrect**.

2. **Evaluate the Second Statement:**
- **Statement:** "Morphine is often given to a person who has undergone surgery as a painkiller."
- **Analysis:** Morphine is an opioid analgesic that is commonly used to relieve pain after surgery. It acts on the central nervous system and is effective in managing pain.
- **Conclusion:** This statement is **correct**.

3. **Evaluate the Third Statement:**
- **Statement:** "Chewing tobacco lowers blood pressure and heart rate."
- **Analysis:** Chewing tobacco actually increases heart rate and blood pressure due to the release of adrenaline. Therefore, this statement is false.
- **Conclusion:** This statement is **incorrect**.

4. **Evaluate the Fourth Statement:**
- **Statement:** "Cocaine is given to patients after surgery as it stimulates recovery."
- **Analysis:** Cocaine is a stimulant that can cause euphoria and is not used as a post-surgery medication. It can lead to serious side effects and is not appropriate for recovery.
- **Conclusion:** This statement is **incorrect**.

### Final Answer:
The correct statement from the options provided is: **"Morphine is often given to a person who has undergone surgery as a painkiller."**

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