From the graph it is clear that I. the stopping potential varies li...

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From the graph it is clear that
I. the stopping potential varies linearly with the frequency of incident radiation for the given metal.
II. the work function of metal \( A \) is greater than that for metal \( B \).
III. the stopping potential is zero below the minimum cut off frequency.
IV. the stopping potential is independent of the intensity of incident radiation.
(a) I and III only
(b) I, III and IV
(c) II and IV only
(d) I, II and IV
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