Correct option is A
The correct one-word for the given group of words is (a)
crematorium.
CREMATORIUM: A building in which corpses are cremated. (श्मशान गृह)
Example: The funeral procession ended at the crematorium.
Meanings of the given other options:
· (b)
Graveyard: A place where dead bodies are buried (कब्रिस्तान)
· (c)
Basement: The lowest floor of a building (तहखाना)
· (d)
Dungeon: A dark underground prison cell (काल कोठरी)