The phenomenon of beats can take place:

A tuning fork of frequency \(512~\text{Hz}\) is vibrated with a sonometer wire and \(6\) beats per second are heard. The beat frequency reduces if the tension in the string is slightly increased. The original frequency of the string is:
1. \(506~\text{Hz}\)
2. \(512~\text{Hz}\)
3. \(518~\text{Hz}\)
4. \(524~\text{Hz}\)