In this question, sentence is given with blank to be filled in with an appropriate word. Four alternatives are suggested for question. Choose the correct alternative out of the four.
The magnificent …..... temple was constructed by the Chinese.

Options

A. eight-centuries-old
B. eight-century's-old
C. old-eight centuries
D. eight-century-old

Answer

D

Explanation

The adjective with two words joined by the hyphen is called a Compound Adjective.
When we have a Compound Adjective using numbers + a time period, the word referring to a time period is in Singular form and is joined to the number With a hyphen.
Here, eight-century-old is the right usage.