The prominent literary form of poetry unique to the Kannada:

Ghazal
Doha
Vachana
Haiku

The correct answer is C. Vachana.

A ghazal is a poetic form that originated in Arabic and Persian literature. It is a lyric poem that consists of a series of couplets, each of which ends with the same rhyme. The ghazal is often used to express love, longing, and loss.

A doha is a poetic form that originated in Arabic literature. It is a quatrain, or four-line poem, that has a rhyme scheme of ABAB. The doha is often used to express religious or philosophical ideas.

A haiku is a poetic form that originated in Japanese literature. It is a three-line poem that has a syllable count of 5-7-5. The haiku is often used to express nature or the seasons.

A vachana is a poetic form that originated in Kannada literature. It is a short, pithy poem that is often used to express religious or philosophical ideas. Vachanas are typically written in the vernacular language of Kannada and are often accompanied by music.

Vachanas are a unique and important part of Kannada literature. They are a valuable source of information about the history and culture of Karnataka, and they continue to be studied and enjoyed by people all over the world.