If we need a magnification of $375$ from a compound microscope of tube length $150\mathrm{}\mathrm{m}\mathrm{m}$ and an objective of focal length $5\mathrm{}\mathrm{m}\mathrm{m},\mathrm{}$ the focal length of the eye-piece, should be close to:

• Correct answer
  A

  $22\mathrm{}\mathrm{m}\mathrm{m}$
• B

  $2\mathrm{}\mathrm{m}\mathrm{m}$
• C

  $4\mathrm{}\mathrm{m}\mathrm{m}$
• D

  $33\mathrm{}\mathrm{m}\mathrm{m}$

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