Q 1124312251.     In photoelectric effect, if the energy required to overcome the attractive forces on the electron, (work functions) of `Li`, `Na` and `Rb` are `2.41eV`, `2.30eV` and `2.09eV` respectively, the work function of `K` could approximately be (in `eV`)?

EAMCET 2012
A

`2.52`

B

`2.20`

C

`2.35`

D

`2.01`

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