Two bodies, A (of mass 1 kg) and B (of mass 3 kg), are dropped from heights of 16 m and 25 m respectively. The ratio of the time taken by them to reach the ground is :

• A

  $\frac{5}{4}$

• B

  $\frac{12}{5}$

• C

  $\frac{5}{12}$

• D

  $\frac{4}{5}$