Assertion`:-`Simple cuboidal brush bordered epthelium is found in `PCT` of nephrons
Reason`:-` Maximum reabsorption of substances takses place in `PCT` of nepthrons.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False

Explanation

To solve the question regarding the assertion and reason about the proximal convoluted tubule (PCT) of nephrons, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
- **Assertion**: Simple cuboidal brush-bordered epithelium is found in the PCT of nephrons.
- **Explanation**: The PCT is indeed lined with simple cuboidal epithelium, which has microvilli (brush border). This structure increases the surface area for absorption.

### Step 2: Analyze the Reason
- **Reason**: Maximum reabsorption of substances takes place in the PCT of nephrons.
- **Explanation**: The PCT is responsible for the majority of reabsorption in the nephron. Approximately 67% of water, along with significant amounts of sodium and potassium ions, are reabsorbed here.

### Step 3: Connect Assertion and Reason
- The presence of simple cuboidal brush-bordered epithelium in the PCT facilitates the maximum reabsorption of substances. The increased surface area due to microvilli allows for more efficient transport of nutrients and ions back into the bloodstream.

### Step 4: Conclusion
- Both the assertion and reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation for the assertion.

### Final Answer
- **Both assertion and reason are true, and the reason is the correct explanation for the assertion.**

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