The correct answer is: A. Chaitra
Chaitra is the first month of the Hindu calendar. It is a month of great significance in Hinduism, as it is the month in which the Hindu New Year is celebrated. The Kali Mai fair is a Hindu festival that is held in the month of Chaitra. The fair is held in honor of the goddess Kali, who is one of the most important deities in Hinduism. The fair is a time for Hindus to worship Kali and to seek her blessings. It is also a time for Hindus to socialize and to enjoy the festivities.
The other options are incorrect because they are not months of the Hindu calendar.
- Phalguna is the twelfth month of the Hindu calendar.
- Bhaado is the fifth month of the Hindu calendar.
- Vaisakha is the second month of the Hindu calendar.