Ambubachi fair is celebrated in which of the following states?

The correct option is Assam.

Explanation:

The Ambubachi Mela (or Ambubachi Fair) is an annual Hindu festival hosted at the famous Kamakhya Temple in Guwahati, Assam.

Key Details about Ambubachi Fair:

1. Location: It is held at the Kamakhya Temple situated atop Nilachal Hill in Guwahati, Assam.
2. Significance: The festival marks the annual menstruation cycle of Goddess Kamakhya, symbolizing fertility and womanhood.
3. Observance: During the four-day event, the doors of the temple remain closed for three days as the goddess is believed to undergo her annual cycle, and reopen on the fourth day for devotees after ceremonial cleansing.