Read the assertion and reson carefully to mark the correct option out of the options given below:
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
A. (A) and (R ) both are correct and (A) is correct explanation
B. (A) is correct, but (R ) is wrong
C. (A) and (R ) both are correct, but (A) is not correct explanation of (R )
D. (A) is wrong and (R ) is correct
