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A and B are two metals with threshold fr...

A and B are two metals with threshold frequencies `1.8 xx 10^(14)`Hz and `2.2 xx 10^(14)` Hz.Two identical photons of energy `0.825` eV each are incident on them.Then photoelectrons are emitted in
(Take `h = 6.6 xx 10^(34)` Js)

A

B alone

B

A alone

C

in neither A nor B

D

in both A and B.

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