Assertion : Vocal cords consists of three pairs of mucous membrane that extend into the lumen of the larynx.
Reason : Sound is produced by only two pairs of cords.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true and reason is not the correct explanation of assertion
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

To analyze the given assertion and reason, we will break down the information step by step.

### Step 1: Understanding the Assertion
The assertion states that "Vocal cords consist of three pairs of mucous membranes that extend into the lumen of the larynx."

- **Analysis**: In reality, there are two pairs of vocal cords in the larynx: the true vocal cords and the false vocal cords. The false vocal cords (or vestibular folds) do not produce sound, while the true vocal cords (or vocal folds) are responsible for sound production. Therefore, the assertion is incorrect.

### Step 2: Understanding the Reason
The reason states that "Sound is produced by only two pairs of cords."

- **Analysis**: This statement is misleading. Sound is produced by the true vocal cords only. The false vocal cords do not contribute to sound production. Therefore, the reason is also incorrect.

### Step 3: Conclusion
Both the assertion and the reason are incorrect.

- **Final Statement**: The correct conclusion is that both the assertion and the reason are false.

### Summary of the Solution
- Assertion: Incorrect (only two pairs of vocal cords exist, not three).
- Reason: Incorrect (sound is produced only by the true vocal cords, not by two pairs).

### Final Answer
Both the assertion and the reason are false.

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