Topic: Correction (Sentence Correction), Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The sentence "Who is the best of the two boys?" contains a subtle error related to the comparison being made. The phrase "best of" implies a selection from a larger group, usually more than two, where one can be most distinguished. In English, when comparing two items or people, we typically use "better" rather than "best." Thus, one should phrase the question as "Who is better, the two boys?" This change effectively communicates the intended comparison.

In contrast, the other options—"Who is the best among these boys?" and "Who is the best among the three boys?"—correctly use "among," which indicates a comparative evaluation within the specified groups without the same ambiguity. Option D, "Who is the best boy of this group?" introduces a collective ranking, which also fits standard English usage. Therefore, the original phrasing in option A is not grammatically or contextually appropriate for comparing two subjects, making it the incorrect choice.