If the two metals $A$ and $B$ are exposed to radiation of wavelength $350 \mathrm{nm}$. The work functions of metals $A$ and $B$ are $4.8 \mathrm{eV} \text{and} 2.2 \mathrm{eV}$. Then choose the correct option

• A

  Metal $B$ will not emit photo-electrons
• B

  Both metals $A$ and $B$ will emit photo-electrons
• C

  Both metals $A$ and $B$ will not emit photoelectrons
• Correct answer
  D

  Metal $A$ will not emit photo-electrons

Hence, the correct answer is option: 'D'.