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.

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 C Assertion is correct but Reason is incorrect
Neurons are excitable cells because their membranes are in a polarised state. Any stimulus given by touch, smell, pressure or chemical bring about changes in its polarity. The phenomenon of change in the chemical polarity across the nerve membrane as a result of nerve impulse is called action potential.

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