The figure shows a plot of photo current versus anode potential for a photo sensitive surface for three different radiations. Which one of the following is a correct statement ? <br>

Question

https://clay6.com/mpaimg/205_a.jpg

( A ) Curves (a) and (b) represent incident radiations of different frequencies and different intensities
( B ) Curves (b) and (c) represent incident radiations same frequencies having same intensity.
( C ) Curves (b) and (c) represent incident radiations of different frequencies and different intensities
( D ) Curves (a) and (b) represent incident radiations of same frequencies but of different intensities