In which of the following states is Me-dam-me-phi festival primarily celebrated?

Correct — C. Me-Dam-Me-Phi is the ancestor-worship festival of the Ahom community, and it is celebrated in Assam on 31 January every year.

Families and the community offer food and prayers to their departed forebears. The name is usually glossed as offerings to the ancestors and to the gods, treating the dead as divine.

The Ahoms ruled the Brahmaputra valley for close to six centuries, which is why the festival belongs to Assam and not to a neighbouring state → option (c).

Why the others are wrong

• (a)
  Bihar — Bihar's signature festival is Chhath Puja, the four-day rite offered to the Sun God at river ghats. It is a solar festival, not an ancestor rite, and has no Ahom connection.
• (b)
  Nagaland — Nagaland is the tempting North-Eastern substitute, but its best-known festival is the Hornbill Festival, held each December at Kisama as a showcase of Naga tribes.
• (d)
  Odisha — Odisha's state festival is Nuakhai, which welcomes the first rice of the season. Its subject is the harvest, not the ancestors.

The Ahoms were a Tai people who entered the Brahmaputra valley in the thirteenth century and ruled it until the British annexation.

Me-Dam-Me-Phi carries their pre-Hindu ancestor worship into the present: the community remembers its dead collectively on a fixed date, 31 January, rather than at a family anniversary.

Assam's other festival cycle, Bihu, is agricultural and comes three times a year. Keeping the two apart is the whole of this question: one marks ancestors, the other marks seasons.

Key facts

• Me-Dam-Me-Phi is celebrated on 31 January every year by the Ahom community of Assam.
• It is a rite of ancestor worship, with offerings made to departed forebears.
• Ahom rule over the Brahmaputra valley ran from the thirteenth century to the British annexation of Assam in 1826.
• Assam's Bihu is observed three times a year and marks the agricultural seasons.

Common traps

• Picking Nagaland because the name sounds tribal and North-Eastern.
• Confusing Me-Dam-Me-Phi with Bihu, which is seasonal rather than an ancestor rite.
• Assuming a fixed January date means a harvest festival, when this one commemorates the dead.

No directly related past PYQ was found.