A mouth instrument made from a single piece of bamboo with a split at one end, played during Bihu, is called the:

Explanation

The gogona is a traditional instrument of Assam made from a single piece of bamboo, with a split or tongue cut into one end. It is a kind of jaw harp (mouth harp), and it is closely associated with the Bihu festival and the Bihu dance.

To play the gogona, the player holds the bamboo frame against the mouth and plucks or strikes the end with a finger. This makes the thin bamboo tongue vibrate, while the player's mouth acts as a resonator. By changing the shape of the mouth and the flow of breath, the player can change the sound and produce a buzzing, rhythmic tune. The gogona is traditionally played by young women during the Bihu dance, and it is often carried tucked into the hair. There are two main types: the "ramdhan gogona", played mainly by men, and the "lahori gogona", played mainly by women.

Bihu is the most important festival of Assam. There are three Bihus: Rongali Bihu (or Bohag Bihu), celebrated in April at the Assamese New Year and the start of the sowing season; Kongali Bihu (or Kati Bihu), in October; and Bhogali Bihu (or Magh Bihu), the harvest festival in January. The Bihu dance, performed by young men and women during Rongali Bihu, is fast and joyful, and it is accompanied by the dhol, the pepa, the gogona, the toka, the xutuli and the flute. The Bihu songs (Bihugeet) are about love, nature and the joy of spring.

In the Indian classification of instruments, the gogona is a ghana vadya, because the sound is produced by a solid vibrating part rather than a string, skin or column of air. Similar jaw harps include the morchang of Rajasthan.

Why not the other options?

• ✗Pepa is a wind instrument made from buffalo horn, played in the Bihu dance.
• ✗Toka is a bamboo clapper used to keep rhythm in Bihu.
• ✗Xutuli is a small clay whistle played in Bihu.