The Lajnah ad-Da’imah was asked the following question :

Question:

Is it permissible for a man to answer his mother while offering Salah (Prayer] whether it is obligatory or supererogatory?

Answer:

If someone commences an obligatory Salah, he will not be permitted to interrupt it in order to answer his mother or father. However, if it is a supererogatory Salah, he will be permitted to interrupt it to answer his parents when there is a pressing need for that.

May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.

The Permanent Committee for Scholarly Research and Ifta’

[Reference]

Also there comes some narrations pertaining to this.

Mentiioned by

AbdulFattaah bin Uthman
Abu Fajr