Assertion: Dope test is used to estimate the level of blood alcohol by analysing the breath of persons drinking alcohol.
Reason: A drunken person usually feels tense and less talkative.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
C. If Assertion is true but the Reason is false.
D. If both Assertion and Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that a dope test is used to estimate the level of blood alcohol by analyzing the breath of persons drinking alcohol.
- **Analysis**: This is incorrect. A dope test is primarily used to check for performance-enhancing drugs in athletes, not for measuring blood alcohol levels.

2. **Understanding the Reason**: The reason provided is that a drunken person usually feels tense and less talkative.
- **Analysis**: This statement is also misleading. While alcohol can affect a person's mood and behavior, it does not universally make everyone feel tense and less talkative. In fact, many individuals may become more talkative or relaxed when intoxicated.

3. **Conclusion on the Assertion and Reason**: Since both the assertion and the reason are incorrect, we conclude that neither statement is true.
- **Final Answer**: Both the assertion and the reason are false.