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.

Although we intake diet food, but proper sleep is necessary to be healthy.

Correct option is C

Answer: (c) proper sleep is
Explanation:
The sentence as written contains a grammatical error due to the incorrect usage of both "although" and "but" together. In standard English, "although" is a subordinating conjunction and does not require the addition of "but" in the same clause.
Breakdown of options:
1. (a) but properly sleep is
· Incorrect: "Properly" is an adverb, and it is incorrectly placed before "sleep," which is a noun.
2. (b) but proper sleep are
· Incorrect: The verb "are" is incorrect because "sleep" is singular and requires "is."
3. (c) proper sleep is
· Correct: The conjunction "but" is removed to maintain grammatical accuracy, and "proper sleep is" ensures subject-verb agreement.
4. (d) then properly sleep is
· Incorrect: The phrase "then properly sleep is" is awkward and does not fit the context.
5. (e) No replacement required
· Incorrect: The original sentence is grammatically incorrect.
Corrected Sentence:
"Although we intake diet food, proper sleep is necessary to be healthy."