With proper energetic radiation, the photoelectric current increases with an increase in accelerating potential until it reaches a point where it reaches its maximum and does not increase with an additional increase in accelerating potential.
For a given potential difference, the photocurrent is directly proportional to the intensity of the incident radiation.
The maximum kinetic energy of the emitted photoelectrons can be written as
Kmax=hν−ϕ
From above equation, it can be seen that the maximum kinetic energy of the photoelectron depends on the frequency of the light used.
Hence, the statements A and C are correct.