Assertion : Cells of Zona reticularis contain large number of SER.
Reason : They are present in adrenal cortex.

Options

A. If both Assertion and Reson are true and the Reason is the correct expalanatio of the Assertion.
B. If both Assertion and Reson are true and the Reason is not the correct explain of the Assertion.
C. If Assertion is true, but Reason is false.
D. If both Assertion and Reason are flase.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "Cells of Zona reticularis contain a large number of SER."
- The Zona reticularis is the innermost layer of the adrenal cortex.
- This layer is responsible for the synthesis of steroid hormones, which are primarily produced in the smooth endoplasmic reticulum (SER).

### Step 2: Understand the Reason
The reason states that "They are present in the adrenal cortex."
- The adrenal cortex has three layers: zona glomerulosa, zona fasciculata, and zona reticularis.
- The Zona reticularis is indeed a part of the adrenal cortex.

### Step 3: Evaluate the Relationship
- The assertion is true because the cells in the Zona reticularis do contain a large number of SER, which is necessary for the synthesis of steroid hormones.
- The reason is also true because the Zona reticularis is located in the adrenal cortex.

### Step 4: Determine the Explanation
- The reason provided explains why the assertion is true. The presence of SER in the Zona reticularis is directly related to its function in the adrenal cortex.

### Conclusion
Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the answer is that both statements are true, and the reason is the correct explanation of the assertion.

### Final Answer
Both the assertion and the reason are true, and the reason is the correct explanation of the assertion.

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