Identify the segment in the sentence, which contains the grammatical error.
Sunita is senior to me in this office and know all the rules.

Correct option is C

The segment "and know" contains the grammatical error.
· The correct form should be "and knows" to agree with the singular subject "Sunita."
· Grammatical rule: In English, the verb must agree in number with its subject.
· In this case, "know" should be conjugated to "knows" to match the third person singular subject.
· Example: He knows all the rules and follows them diligently, similarly using the correct verb form for a singular subject.