DIRECTIONS: Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question the basis of following options. You have to select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct.

Assertion: Ear muscles of external ear in man are poorly developed.
Reason: These muscles are useful which move external ear freely to detect sound efficiently.

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Solution

Assertion statement :
The external ear in humans is a vestigial organ and is poorly developed.
It comprises of pinna or auricle whose muscles are useless as in many mammals these muscles are used to move their pinnae to collect the sound waves and focus their hearing in a certain direction.
Reason statement :
Such function is absent in human pinna.
It is just protective and increases the efficiency of hearing.
Final answer :
(c) If Assertion is correct but Reason is incorrect.

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Similar questions

DIRECTIONS: Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question the basis of following options. You have to select the one that best describes the two statements.

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

(d) If Assertion is incorrect but Reason is correct.

Assertion: Chromosomes are known as hereditary vehicles.

Reason: The chromosomes are capable of self-reproduction and maintaining morphological and physiological properties through successive generations.

Q. Assertion :Ear muscles of the external ear in man are poorly developed. Reason: These muscles are useful which move external ear freely to detect sound efficiently.

The questions below consist of Assertion (A) and Reason (R). Use the following key to select the correct answer:

(a) If both assertion and reason are correct and the reason is the correct explanation for the assertion.

(b) If both assertion and reason are correct but the reason is not the correct explanation for the assertion.

(d) If the assertion is incorrect but the reason is correct.

Assertion: Ionic solids are good conductors of electricity.

Reason: Ionic solids consists of anions and cations.

The questions below consist of Assertion (A) and Reason (R). Use the following key to select the correct answer:

(a) If both assertion and reason are correct and the reason is the correct explanation for the assertion.

(b) If both assertion and reason are correct but the reason is not the correct explanation for the assertion.

(d) If the assertion is incorrect but the reason is correct.

Assertion: Smoke is a colloidal solution in which dust particles i.e. carbon particles are suspended in the air.

Reason: Smoke may be regarded as an aerosol.

The questions below consist of Assertion (A) and Reason (R). Use the following key to select the correct answer:

(a) If both assertion and reason are correct and the reason is the correct explanation for the assertion.

(b) If both assertion and reason are correct but the reason is not the correct explanation for the assertion.

(d) If the assertion is incorrect but the reason is correct.

Assertion: A mixture of ammonium chloride and sand can be easily separated.

Reason: Ammonium chloride is water-soluble while sand is not.

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