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Question

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

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is D Both Assertion and Reason are incorrect
Inside the larynx are present two pairs of vocal cords. One pair is of false vocal cords which has little to do with sound production and the second inner pair is true vocal cords.When air is forced through the. larynx, it causes vibration of the true vocal cords and sound is produced. The pitch of sound is determined by the tension on the vocal cords-the greater the tension, the higher the pitch. So, the correct answer is 'Both Assertion and Reason are incorrect'.

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