Given below are four sentences, out of which one sentence is grammatically correct. Choose the option which points out the grammatically correct sentence. If all sentences are incorrect. Choose ‘All sentences are incorrect’ as your answer.

Correct option is E

The correct answer is (E) All sentences are incorrect.

Analysis of Each Sentence

• Sentence (A) is incorrect:
• The Error: "Since he enjoys his career as a police officer, he is thinking about becoming a fireman instead."
• The Logic: The conjunction "since" usually implies a cause-and-effect relationship (e.g., "Since I'm hungry, I'll eat"). It is logically contradictory to say that because he enjoys his current job, he wants to switch to a different one. It should use a contrast conjunction like "Although" or "Even though."
• Sentence (B) is incorrect:
• The Error: "Not only she did excel..."
• The Correction: When a sentence begins with a negative expression like "Not only," the subject and the auxiliary verb must be inverted.
• Correct form: "Not only did she excel in academics..."
• Sentence (C) is incorrect:
• The Error: "...my parents went to reprimand me..."
• The Correction: This is an error of tense/intention. "Went" implies a completed action in the past, but the reason ("for not passing... this semester") implies a future or imminent consequence. It should be "are going to reprimand me" or "will reprimand me."
• Sentence (D) is incorrect:
• The Error: "...many people found out a loophole..."
• The Correction: You "find" a loophole (discover a gap in a law). "Found out" is typically used for discovering a fact or a secret (e.g., "I found out he was lying"). While similar, "found a loophole" is the correct idiomatic expression for legal/procedural contexts.

Grammar Rule: Inversion with Negative Adverbs

When you start a sentence with a negative or restrictive adverb (like Not only, Seldom, Never, Rarely), the word order must change to a question-like structure.