In the following figure shows the variation of photocurrent with potential of the collector plat...

In the following figure shows the variation of photocurrent with potential of the collector plate for a photosensitive surface for three different radiations. Let \( I_{a}, I_{b} \), and
\( I_{c} \) be the intensities and \( f_{a}, f_{b} \), and \( f_{c} \) be the frequencies for the curves \( a, b \), and \( c \), respectively.
(A) \( f_{a}=f_{b} \) and \( I_{a}=I_{b} \)
(B) \( f_{a}=f_{c} \) and \( I_{a}=I_{c} \)
(C) \( f_{a}=f_{b} \) and \( I_{a}I_{b} \)
(D) \( f_{a}=f_{c} \) and \( I_{b}=I_{c} \)