Five elements A, B, C, D and E have work functions 1.2 eV, 2.4 eV, 3.6 eV, 4.g eV and 6 eV respectively. If light of wavelength 4000$\stackrel{\mathrm{o}}{\mathrm{A}}$ is allowed to fall on these elements, then photoelectrons are emitted by

• A

  A, B and C

• B

  A.C.D and E

• C

  A and B

• D

  Only E