Topic: Pronoun (সর্বনাম),

Best Answer Explained in Below-:

A demonstrative pronoun is a type of pronoun used to point to specific things or people and can indicate proximity in terms of distance. The four primary demonstrative pronouns are "this," "that," "these," and "those."

In the given options, "those" (Option C) stands out as the only demonstrative pronoun. It is used to refer to plural nouns that are farther away in distance or time. For instance, one might say, "Those are my friends over there," clearly indicating a separation from the speaker.

In contrast, the other options do not serve the same function. "He" (Option A) is a personal pronoun used to refer to a singular male person. "Yourself" (Option B) is a reflexive pronoun that emphasizes the subject or refers back to it, often used for clarity or emphasis in phrases like "Do it yourself." Lastly, "who" (Option D) is an interrogative pronoun that is used to ask questions about a person or people.

Thus, "those" is the correct choice as it fulfills the criteria of a demonstrative pronoun, while the others do not.