Assertion :Nerve fibre can become excited through touch, smell, pressure and chemical changes and there is a change in polarity. Reason: It is called active potential.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Nerve fibre can become excited through various stimuli like touch, smell, pressure and chemical changes and there is a change in polarity. This change in polarity is called as action potential or active potential. Hence, assertion and reason both are correct. However, reason is not the correct explanation of assertion.
Thus, the correct answer is option B.

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Similar questions

Q. Assertion :Nerve fibre can become excited through touch, smell, pressure and chemical changes and there is change in polarity.
Reason: It is called active potential.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
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Reason (R) We cannot determine order from balanced chemical equation.

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