A category of Mizo folk songs expressing love and longing is called:

The correct answer is: a) Chawnglaizawn.

Chawnglaizawn is a category of Mizo folk songs expressing love and longing. It is a type of love song that is often sung by young people. The songs are usually about unrequited love, and they often express the singer’s sadness and longing for the person they love.

The other options are incorrect.

• Zai Zai is a type of Mizo folk song that is often sung at weddings and other celebrations. It is a happy and upbeat song that is about love and happiness.
• Hlado is a type of Mizo folk song that is often sung at funerals. It is a sad and mournful song that is about death and loss.
• Mizo Zirlai Pawl is a Mizo cultural organization that promotes Mizo culture and traditions. It is not a type of folk song.