A particle is released from rest from a tower of height $3h$. The ratio of time taken to fall equal heights $h$ i.e., $t_1:t_2:t_3$ is

• A

  $\sqrt{3}\text{ : }\sqrt{2}\text{ : }1$
• B

  $\text{3 : 2 : 1}$
• C

  $\text{9 : 4 : 1}$
• Correct answer
  D

  $1\text{ : }\left(\sqrt{2}-1\right)\text{ : }\left(\sqrt{3}-\sqrt{2}\right)$

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