Maximum velocity of photoelectrons when the frequency is a multiple of the threshold frequency

1. A.
   $\sqrt{\frac{6hv}{m}}$
2. B.
   $\sqrt{\frac{3hv}{m}}$
3. C.
   $\sqrt{\frac{h\nu}{m}}$
4. D.
   $\sqrt{\frac{5\text{ }hv}{\text{ }m}}$

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1. A.
   $\sqrt{\dfrac{h\nu}{2m}}$
2. B.
   $\sqrt{\dfrac{h\nu}{m}}$
3. C.
   $2\left(\sqrt{\dfrac{h\nu}{m}}\right)$
4. D.
   $\sqrt{\dfrac{2h\nu}{m}}$

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