Question
In each of the questions, a sentence has been divided
into four parts, one of which may contain an error. Identify that fragment and mark it as your answer. The words in bold are contextually and grammatically correct. Mark (E) if the sentence contains no error. India was never united (A) / before the British brought (B) /the whole country under (C) / an single administrative structure (D) / no error (E).Solution
The error lies in the use of "an" before "single administrative structure." The correct article to use here is "a," not "an," because the word "single" begins with a consonant sound. The article "a" is used before words that start with a consonant sound, while "an" is used before words that start with a vowel sound.
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  function modifyArray(arr) {
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   ...
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