Find the correct match of grammatical function with usage for the word THEN.

In sentence 5, "then" is used to describe the noun "king", i.e., as an adjective. Thus, 2 - 5 is a match.

In sentence 7, "then" is used to join two sentences, i.e., as conjunction. Thus, 4 - 7 is a match.

In sentence 6, "then" is used as a noun to specify a point in time. Thus, 1 - 6 is a match.

In sentence 8, "then" acts as a temporal adverb indicating a specific time frame. Thus, 3 - 8 is a match

Hence, the answer is option B.