The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
One of these / boxes have / the portrait / of the heiress.

Correct option is A

Option (A) contains an error.

Error Explanation:

• The phrase "One of these boxes" refers to one box out of multiple. The subject "One" is singular, and the verb must agree with it.
• "Have" is incorrect because it is used for plural subjects.
• The correct verb should be "has" to match the singular subject "One".

Grammatical Rule Used:

• "One of + plural noun" takes a singular verb.
• Example: One of these books is very interesting. (Not are)
• Example: One of my friends has gone to London. (Not have)

Correct sentence:
"One of these boxes has the portrait of the heiress."

Thus, the correct answer is (A) boxes have.