Answer:
option (A) is correct
Step-by-step explanation:
The taken to complete one full cycle of motion on a spring is called its period or time period.
It is denoted by T and its SI unit is second.
The number of oscillations completed in one second is called frequency. It is denoted by f and its SI unit is Hertz.
Period is the reciprocal of frequency.
The maximum displacement from its mean position is called amplitude. Its SI unit is metre.