In the following question, a sentence has been given in the Active/Passive voice. Out of the four alternatives suggested, select the option which best expresses the same sentence in the Passive voice: The boxer landed an upper cut to the chin of his opponent.

Introduction / Context:
In this question you are again dealing with Active to Passive transformation in the simple past tense. The intended active sentence is best read as: "The boxer landed an upper cut to the chin of his opponent." You must choose the alternative that expresses this meaning in the Passive voice as naturally and accurately as possible among the given exam-style options.

Given Data / Assumptions:

• Active sentence: The boxer landed an upper cut to the chin of his opponent.
• Subject: "The boxer."
• Object: "an upper cut."
• Complement: "to the chin of his opponent."
• Tense: simple past ("landed").
• We want "an upper cut" to become the subject in the Passive voice.

Concept / Approach:
For simple past Active sentences, the standard Passive structure is: object + "was/were" + past participle + "by" + subject. Here, "an upper cut" is the object and will become the subject of the Passive sentence. "Landed" becomes "was landed," and "by the boxer" represents the agent. The phrase "to the chin of his opponent" stays to show where the blow was delivered. Among the options, we select the one that matches this pattern and tense most closely, even if the wording is slightly stiff in exam style.

Step-by-Step Solution:
Step 1: Identify the object: "an upper cut." Step 2: Move it to the subject position: "An upper cut ..." Step 3: Use simple past Passive with singular subject: "was landed." Step 4: Keep the complement: "... to the chin of his opponent ..." Step 5: Add the agent: "... by the boxer." Step 6: Final Passive sentence: "An upper cut was landed to the chin of his opponent by the boxer."

Verification / Alternative check:
If we convert "An upper cut was landed to the chin of his opponent by the boxer" back to Active voice, we get: "The boxer landed an upper cut to the chin of his opponent." The tense, main action, and key elements are all preserved. This confirms that option D, although slightly formal in style, is the closest and correct Passive transformation.

Why Other Options Are Wrong:
Option A: "Landing of an upper cut was done..." uses an unnatural nominal structure "Landing of an upper cut" and adds "was done," which is not needed in direct Passive transformation. Option B: "The chin of the opponent is where the upper cut of the boxer has landed" changes the focus to the chin and uses present perfect "has landed" instead of simple past. Option C: "Upper cutting of the chin..." is grammatically awkward because "upper cutting" is not a standard noun phrase in this context, and the tense is also changed.

Common Pitfalls:
An important pitfall is being distracted by complicated or fancy wording. In sentence transformation questions, the best answer is usually the one that follows the standard grammatical rule in the simplest way. Also, students sometimes incorrectly think that the Passive must start with the place ("The chin of the opponent...") or use "has been done." Remember to keep the same tense and retain the original object as the new subject.

Final Answer:
The correct Passive voice sentence is: "An upper cut was landed to the chin of his opponent by the boxer."