5 men and 4 women are seated in a row. If the number of arragements in which one particular man and one particular woman are together is ' $\alpha$ ' and the number of arrangements in which those two are not together is $\beta$, then $\alpha: \beta=$

• Correct answer
  A

  $2: 7$
• B

  $2: 9$
• C

  $4: 5$
• D

  $7: 2$

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