Consider the following pairs:
Event : Time interval (Seconds)
1] Period of X-rays : 10-8
2] Life time of an excited state of an atom : 10-1
3] Time between successive human heartbeats : 100
4] Rotation period of the earth : 105
Which of the above pairs are correctly matched?

A

2 and 4 only

B

3 and 4 only

C

1 and 4 only

D

2 , 3 and 4 only