In an oil drop experiment, negatively charged droplets of equal mass $\left(2.93 \times 10^{-15} \mathrm{~kg}\right)$ are studied as they fall through vacuum. An electric field of magnitude $5.92 \times 10^4 \mathrm{~N} / \mathrm{C}$, pointing downwards, is present. It is observed that a droplet of charge $Q_1$ remains suspended while another with charge $Q_2$ falls through 0.125 m from rest in 0.25 s . The $Q_1 / Q_2$ is closest to,

• Correct answer
  A

  $1.67$
• B

  $1.95$
• C

  $1.24$
• D

  $2.22$

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