Assertion: The patients of cholera, vomiting and dysentery are given intravenous drip of saline solution.
Reason: The saline solution kills the disease causing micro-organisms, after vomiting and dysentery.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

### Step-by-Step Solution

1. **Understanding the Assertion**:
- The assertion states that patients suffering from cholera, vomiting, and dysentery are given an intravenous drip of saline solution.
- This statement is true because these conditions often lead to severe dehydration due to excessive fluid loss.

2. **Understanding the Reason**:
- The reason provided claims that the saline solution kills the disease-causing microorganisms after vomiting and dysentery.
- This statement is false. Saline solution is not an antimicrobial agent; it does not kill microorganisms.

3. **Analyzing the Purpose of Saline Solution**:
- The primary purpose of administering saline solution is to rehydrate the patient and replenish lost electrolytes.
- It helps restore the fluid balance in the body but does not have any direct effect on the pathogens causing the diseases.

4. **Identifying the Correctness of Assertion and Reason**:
- Since the assertion is true (patients are given saline for rehydration) and the reason is false (saline does not kill microorganisms), we conclude that the assertion is correct while the reason is incorrect.

5. **Final Conclusion**:
- Based on the analysis, the correct answer is that the assertion is true and the reason is false. Therefore, the appropriate option is option 3.