If three dice are thrown at a time, then the probability of getting the sum of the numbers on them as a prime number is

• A

  $\frac{3}{8}$
• Correct answer
  B

  $\frac{73}{216}$
• C

  $\frac{4}{27}$
• D

  $\frac{5}{54}$

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