A type of Mizo folk song often sung during festivals and celebrations is called:

The correct answer is: b) Hla.

Hla is a type of Mizo folk song often sung during festivals and celebrations. It is a traditional song that is passed down from generation to generation. Hla songs are usually about love, loss, and nature. They are often accompanied by traditional Mizo instruments, such as the zuh (a bamboo flute) and the tlawm (a drum).

The other options are incorrect because:

• Zai is a type of Mizo folk dance.
• Thalfavang Kut is a type of Mizo folk music that is played during funerals.
• Khuallam is a type of Mizo folk music that is played during weddings.