Assertion: Pregnant women may show some presence of glucose in their postprandial urine although they have no diabetes.
Reason: In pregnant women the glomerular filtration rate is slightly increased. As a result the tubular load of glucose exceeds the tubular maximum for glucose reabsorption.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertin, then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertin, then mark (2)
C. If Assertion is true statement but Reason is false, then mark (3)
D. If both Assertin and Reason are false statements, then mark (4)

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that pregnant women may show glucose in their postprandial urine even if they do not have diabetes. This is an important observation as it indicates that the presence of glucose is not solely indicative of diabetes.

2. **Understanding the Reason**: The reason given is that during pregnancy, the glomerular filtration rate (GFR) is slightly increased. This means that the kidneys filter blood more efficiently and rapidly than normal.

3. **Linking Assertion and Reason**: The increase in GFR leads to a higher tubular load of glucose. The kidneys have a maximum capacity for reabsorbing glucose, known as the tubular maximum (Tm). When the tubular load of glucose exceeds this maximum, glucose spills over into the urine.

4. **Conclusion**: Since the assertion is that glucose can be present in urine during pregnancy, and the reason explains why this occurs (due to increased GFR leading to exceeding the Tm for glucose), we can conclude that the reason supports the assertion. Therefore, both the assertion and reason are true, and the reason correctly explains the assertion.

5. **Final Statement**: The correct option is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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