The AudioSource is what you’re using to play the sound.
Either by using [*Play*](https://docs.unity3d.com/Documentation/ScriptReference/AudioSource.Play.html) or [*PlayOneShot*](https://docs.unity3d.com/Documentation/ScriptReference/AudioSource.PlayOneShot.html).
In the case of Play you set the clip first:
// This can be done at Start
AudioSource myAudioSource = GameObject.FindWithTag("Som"+perguntaAtual).audio;
myAudioSource.clip = myAudioClip;
// This can be done wherever you want it to play
myAudioSource.Play();
Using PlayOneShot you just pass through the clip to the function.