Institution: Directorate of Primary Education - DPE Exam: Primary Exam Question Solution 21-06-2019
Topic: Number (সংখ্যা), Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

In the context of the question "Which one is plural?", we must first understand the definitions of the options provided.

1. **Someone** - This word is a singular indefinite pronoun used to refer to an unspecified person. It is not plural.

2. **Each** - This term is also singular and is used to refer to every one of two or more items considered individually. It does not indicate a plural quantity.

3. **None of these** - This option implies that none of the previous options are plural. Therefore, it serves as a counter to the rest.

4. **Anyone** - Like "someone," this word is a singular pronoun that refers to any person or one person at all. It is not plural either.

All the provided options—someone, each, and anyone—are singular pronouns, each denoting a single entity. Therefore, the correct choice is C) None of these, as none of the options represent a plural form. Understanding the distinction between singular and plural is crucial in this context, leading to the conclusion that all listed choices are singular, thus confirming C as the right answer.