My grandfather owns / fifty acre / of wet land.

My grandfather owns
fifty acre
of wet land
No error

The correct answer is D. No error.

The sentence is grammatically correct. The word “acre” is a noun that refers to a unit of land measurement, and the word “wetland” is a noun that refers to an area of land that is saturated with water. The two nouns are joined by the preposition “of,” which is used to indicate possession.

The sentence could be rewritten as “My grandfather owns fifty acres of wetland.” However, the original sentence is also correct.