Atomic numbers of three elements $\mathrm{E}_1, \mathrm{E}_2$ and $\mathrm{E}_3$ of periodic table are $\mathrm{Z}_1, 50$ and $\mathrm{Z}_2$ respectively. From the position of the elements shown in figure, the value of $\left(Z_2-Z_1\right)$ is

• Correct answer
  A

  $52$
• B

  $46$
• C

  $64$
• D

  $34$

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