Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Emission of electrons in photoelectric effect can be suppressed by applying a sufficiently negative electron potential to the photoemissive substance.

Reason (R) : A negative electric potential, which stops the emission of electrons from the surface of a photoemissive substance, varies linearly with frequency of incident radiation.

In the light of the above statements, choose the most appropriate answer from the options given below :

1. A <p>Both (A) and (R) are true and (R) is the correct explanation of (A).</p>
2. B <p>Both (A) and (R) are true but (R) is not the correct explanation of (A).</p> Correct answer
3. C <p>(A) is false but (R) is true</p>
4. D <p>(A) is true but (R) is false</p>