A beam of wavelength \( \lambda \) and intensity \( I \) falls over a clean surface of sodium me...

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A beam of wavelength \( \lambda \) and intensity \( I \) falls over a clean surface of sodium metal. If \( N \) photoelectrons are emitted with kinetic energy \( E \), then
(a) \( N \propto I \) and \( E \propto I \)
(b) \( N \propto I \) and \( E \propto \frac{1}{\lambda} \)
(c) \( N \propto \lambda \) and \( E \propto I \)
(d) \( N \propto \frac{1}{\lambda} \) and \( E \propto \frac{1}{I} \)
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