Bhatiali is the folk music of which of the following states?

West Bengal

The correct answer is Option (4) → West Bengal

Bhatiali is a form of folk music that originated in the state of West Bengal, India, particularly in the regions surrounding the Sundarbans and the deltaic areas of the Ganges and Brahmaputra rivers. It is also prevalent in Bangladesh, where it is considered a significant part of the country's cultural heritage.