Select the most appropriate option to fill in blank no.4.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. which.
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The theme of the passage is how technological advancements have come at the cost of nature which has led to rising environmental diseases.
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In the given sentence, we have to use a relative pronoun, as the word nation is mentioned before the blank.
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Thus, the correct relative pronoun is 'which' that used to refer to things or entities.
Hence, the correct answer is Option 3 i.e. which.