Which of the following statement is correct `:`

Options

A. Afferent Arteriole if narrower than Efferent Arteriole
B. Afferent Venule is narrower than Efferent Venule
C. Efferent Arteriole is narrower than Afferent Arteriole
D. Efferent Venule is narrower than Afferent Venule

Answer

To determine which of the given statements is correct, we will analyze each statement regarding the afferent and efferent arterioles and venules.

### Step-by-Step Solution:

1. **Analyze Statement 1**: "Afferent arteriole is narrower than efferent arteriole."
- The afferent arteriole is actually wider than the efferent arteriole. Therefore, this statement is **incorrect**.

2. **Analyze Statement 2**: "Afferent venule is narrower than efferent venule."
- In general, venules do not have a significant size difference as they are part of the same system. Thus, this statement is also **incorrect**.

3. **Analyze Statement 3**: "Efferent arteriole is narrower than afferent arteriole."
- This statement is true. The efferent arteriole has a smaller diameter compared to the afferent arteriole. Therefore, this statement is **correct**.

4. **Analyze Statement 4**: "Efferent venule is narrower than afferent venule."
- Similar to statement 2, there is no significant size difference between the venules. Hence, this statement is **incorrect**.

### Conclusion:
The correct statement among the options provided is **Statement 3: "Efferent arteriole is narrower than afferent arteriole."**

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