Who among the following singers was called ‘Mallika-e-Ghazal’ or the queen of Ghazal?

Begum Akhtar

The correct answer is Option (2) → Begum Akhtar

Out of the singers you listed, the title "Mallika-e-Ghazal" (Queen of Ghazal) belongs to Begum Akhtar. Begum Akhtar was a legendary Indian singer known for her soulful renditions of ghazals, dadra, and thumri in the Hindustani classical music tradition.