In the question below, a statement with a highlighted phrase is given. Choose the most appropriate replacement from the given options which could replace the highlighted phrase to make the statement grammatically and contextually correct. If the highlighted phrase is already correct, then choose option “No replacement required” as the answer response.

Living in Mumbai is more costlier than living in Delhi.

Correct option is B

Answer: (b) is costlier than
Explanation:
The original sentence "is more costlier than" is grammatically incorrect because "more" and "costlier" together create redundancy. The word "costlier" already implies a comparative degree, so "more" is unnecessary.
Breakdown of options:
1. (a) is more costlier then
· Incorrect: "More costlier" is redundant, and "then" is incorrect; the correct word is "than."
2. (b) is costlier than
· Correct: "Costlier" alone is sufficient to indicate comparison, and "than" is correctly used.
3. (c) is much costlier than
· Incorrect: While grammatically correct, the addition of "much" changes the tone, implying a significantly higher cost, which is not stated in the original sentence.
4. (d) are most costly than
· Incorrect: "Are" does not agree with the singular subject "Living in Mumbai," and "most costly" is grammatically incorrect in this context.
5. (e) No replacement required
· Incorrect: The original sentence contains a redundancy error.
Corrected Sentence:
"Living in Mumbai is costlier than living in Delhi."