Which part/s of the given sentence has an error? The first and the se…

The correct answer is Option (4) → D

Subject-verb agreement:

• The verb agrees with the subject, not with the noun nearest to it.
• This sentence:
  • The subject is "The first and the second paragraphs", two paragraphs, so it is plural.
  • "Of the article" only describes the paragraphs. The singular "article" does not decide the verb.
  • So "is" must become "are": "The first and the second paragraphs of the article are very interesting."
    Example: The pages of this book are torn.

(A) The first and the second — No error.

• It names two paragraphs.

(B) paragraphs — No error.

• The plural noun is right for two paragraphs.

(C) of the article — No error.

• The phrase only describes the paragraphs.

(D) is very interesting — Error.

• The plural subject needs are, not "is".
• Correct form: are very interesting