Institution: Directorate of Nursing Services (DNS) Exam: ডিপ্লোমা ইন নার্সিং ভর্তি পরীক্ষা। ২০২২-২০২৩ || নার্সিং(Nursing) ভর্তি পরীক্ষা || 2023
Topic: English literature, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

In the sentence "The man is extremely tired," the word "extremely" functions as an adverb. To understand why, it's essential to recognize the roles that different parts of speech play in a sentence.

Adjectives modify nouns, providing more information about them. In this case, "tired" is an adjective that describes the noun "man." It tells us about the man's state or condition. However, "extremely" is modifying the adjective "tired," indicating the degree to which the man is tired. This degree signifies intensity—specifically, that he is not just tired, but very tired.

Adverbs often provide information about how, when, where, or to what extent an action is performed or a quality is expressed. Since "extremely" expresses the intensity of the tiredness (an adjective), it fits the definition of an adverb. The presence of "extremely" enhances our understanding of the man's condition by giving context to how tired he is. Therefore, the correct answer is C: adverb, as it accurately describes the function of "extremely" in the sentence.