The figure shows the variation of photocurrent $i$ with anode potential $V$ 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. Then

  • A
    $f_a=f_b$ and $I_a \neq I_b$
  • B
    $f_a=f_c$ and $I_a=I_c$
  • C
    $f_a=f_b$ and $I_a=I_b$
  • D
    $f_b=f_c$ and $I_b=I_c$

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