Select the most appropriate option to substitute the highlighted segment in the given sentence. If there is no need to substitute it, select ‘No substitution’.
No sooner she had put the baby to sleep when a loud noise woke him up.

Correct option is A

The correct substitution for the highlighted segment in the sentence "No sooner she had put the baby to sleep when a loud noise woke him up" is (A) "Scarcely had she."

• Explanation: The original sentence structure is incorrect with the use of "No sooner" followed by "when." The correct conjunction to use with "No sooner" is "than." However, since "than" is not part of the options, the correct substitution using another similar construction is "Scarcely had she," which should be followed by "when" to form a grammatically correct sentence.
• Corrected Sentence: "Scarcely had she put the baby to sleep when a loud noise woke him up."