THE RULES OF SUBJECT VERB CONCORD:
1. Doesn't is a contraction of does not and should be used only with a singular subject. Don't is a contraction of do not and should be used only with a plural subject. The exception to this rule appears in the case of the first person and second person pronouns I and you. With these pronouns, the contraction don't should be used.
Example: She doesn't like it.
Ram and Sony don't like it.
2. Do not be misled by a phrase that comes between the subject and the verb. The verb agrees with the subject, not with a noun or pronoun in the phrase.
Example: One of the student is absent.
The student who listen to the teacher are few.
The team captain, as well as his players,is active.
The novel, including all the chapters in the first section, is boring.
6. The words each, each one, either, neither, everyone, everybody, anybody, anyone, nobody, somebody, someone, and no one are singular and require a singular verb.
Example: Each of these dishes is tasty.
Everybody knows Mr.Naresh.
Either is not correct.