Total number of ways in which ‘2n’ persons can be divided into ‘n’ couples is

• A

  $\frac{\left(2n\right)!}{n{\left(2n\right)}^n}$

• B

  $\frac{\left(2n\right)!}{n!{\left(2!\right)}^n}$

• C

  $\frac{\left(2n\right)!}{n\left(2!\right)}$

• D

  $\frac{\left(2n\right)!}{n}$