Select the most appropriate spelling that can correctly substitute the misspelt highlighted segment in the given sentence.
The thick dirt on the building was the acretion of ages.

Correct option is B

Option (b) is correctly spelt word.
Correct spelling is: “ accretion — the process of growth or increase by gradual accumulation; in geology/astronomy, the coming together of matter by gravitational attraction or deposition.” (हिंदी अर्थ: संचयन/क्रमिक वृद्धि, परत जमने से वृद्धि)
Example: Over centuries, the delta expanded through the accretion of silt carried by the river.
Explain parts of speech of the word that is incorrectly spelt
Accretion is a noun. Related forms: accrete (verb: to grow or fuse together; हिंदी: जुड़कर बढ़ना), accretionary (adjective: relating to accretion; हिंदी: संचयी/संचयनशील). The misspelt segment “acretion” omits the second ‘c’, which is essential to preserve the base verb “accrete” in the noun form “accretion”.