Which of the following words is NOT a classification of sentence function?

a. interrogative

b. imperative

c. exclamatory

d. question

The correct answer is letter D. This choice defines the interrogative classification of a sentence function. The other three choices, imperative, interrogative, and exclamatory are all sentence functions that refer to how a person delivers or writes the sentences conveying specific emotions.

There are four kinds of sentence functions, and those are: interrogative, declarative, exclamatory, and imperative.

So the word which is not supposed to be here is d. question.