Question

it is necessary however to maintain a normal weight.

• it is necessary however, to maintain normal weight.
• it is necessary, however to maintain normal weight.
• it is necessary, however, to maintain normal weight.
• no change

Explanation:

Analyze the role of the conjunctive adverb

The word "however" is used as an interrupter (parenthetical adverb) in the middle of the clause.

Determine correct punctuation

A parenthetical interrupter must be set off with commas on both sides to separate it from the rest of the sentence.

Evaluate the options

• "It is necessary however, to maintain normal weight." (Missing comma before "however")
• "It is necessary, however to maintain normal weight." (Missing comma after "however")
• "It is necessary, however, to maintain normal weight." (Correctly set off with commas on both sides)
• "no change" (Missing commas entirely)

Answer:

• (A) It is necessary however, to maintain normal weight.
• (B) It is necessary, however to maintain normal weight.
• (C) It is necessary, however, to maintain normal weight. (Correct answer)
• (D) no change