A typist claims that he prepares a typed page with typo errors of 1 per 10 pages. In a typing assignment of 40 pages, if the probability that the typo errors are at most 2 is p, then $e^2 \mathrm{p}=$

• A

  $5$
• B

  $13$
• Correct answer
  C

  $13 e^{-2}$
• D

  $5 e^{-2}$

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