Q. In . . . . . . . . past, . . . . . . . . air pollution was generally considered basically . . . . . . . . urban phenomenon.
✅ Correct Answer: (B)
the, no article, an
Explanation: The first blank shall take 'the' as the sentence talks about a specific time. The second blank won't take any article as 'air pollution' is uncountable. The third blank shall take 'an' as the following phrase 'urban phenomenon' is a singular countable noun and starts with the vowel 'u'.
Explanation by: Mr. Dubey
The first blank shall take 'the' as the sentence talks about a specific time. The second blank won't take any article as 'air pollution' is uncountable. The third blank shall take 'an' as the following phrase 'urban phenomenon' is a singular countable noun and starts with the vowel 'u'.