Answer : 4. "A form of Lok Natya full of poetry "
Explanation :

1. Charbait is a 400-year-old traditional performance art, performed by a group of artists or singers. Charbait or four verses is a form of folklore and performance art.

2. It still survives today mainly in Rampur (Uttar Pradesh), Tonk (Rajasthan), Bhopal (Madhya Pradesh) and Hyderabad (Andhra Pradesh).

3. The origin of the word charbait can be traced to the Persian language where it refers to a four-stanza poem in which each stanza is made up of four lines.