The graph between \( 1 / \lambda \) and stopping potential \( (V) \) of three metals having work...

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The graph between \( 1 / \lambda \) and stopping potential \( (V) \) of three metals having work functions \( \phi_{1}, \phi_{2} \) and \( \phi_{3} \) in an experiment of photoelectric effect is plotted as shown in the figure. Which of the following statement(s) is/are correct? [Here \( \lambda \) is the wavelength of the incident ray].
(a) Ratio of work functions \( \phi_{1}: \phi_{2}: \phi_{3}=1: 2: 4 \)
(b) Ratio of work functions \( \phi_{1}: \phi_{2}: \phi_{3}=4: 2: 1 \)
(c) \( \tan \theta \) is directly proportional to \( h c l e \), where \( h \) is Plancks constant and \( c \) is the speed of light
(d) The violet colour light can eject photoelectrons from metals 2 and 3
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