The correct answer is C. Rainy season.
Kajali songs are a type of folk song that is sung in Jharkhand during the rainy season. The songs are about the beauty of the rain and the joy that it brings. They are also about the hardships that people face during the rainy season, such as the loss of crops and the difficulty of getting around.
The songs are usually sung by women, and they are often accompanied by dancing. The songs are a way for people to express their feelings about the rain and to connect with each other.
A. Time of Holi is incorrect because Holi is a Hindu festival that is celebrated in the spring. Kajali songs are not sung during this time.
B. Time of rabi crop is incorrect because the rabi crop is a winter crop. Kajali songs are not sung during this time.
D. Chaitra month is incorrect because Chaitra is the first month of the Hindu calendar. Kajali songs are not sung during this time.