The work function of a metal is

In the photoelectric effect,a photocell is used for the conversion of ..........

Which of the following phenomena exhibits the particle nature of light?

If the intensity of incident light is increased in $PEE$,then which of the following is true?

If the intensity of incident radiation in a photocell is increased, the stopping potential

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A :$ In photoelectric effect,on increasing the intensity of incident light,the stopping potential increases.
Reason $R :$ Increase in intensity of light increases the rate of photoelectrons emitted,provided the frequency of incident light is greater than threshold frequency.
In the light of the above statements,choose the correct answer from the options given below: