Okay, let's tackle this question. The patient is a 4-year-old who had their maxillary right primary central incisor avulsed 60 minutes ago. The question is about the treatment of choice.

First, I need to recall the management of avulsed primary teeth. Primary teeth have different considerations compared to permanent teeth. For permanent teeth, immediate replantation is often recommended if possible, but for primary teeth, it's different. The main reason is that the roots of primary teeth are physiologically resorbing, and replanting them could cause damage to the developing permanent tooth germ.

The core concept here is the management of avulsed primary teeth. The key point is that replantation is generally contraindicated because of the risk of injury to the underlying permanent tooth. Instead, the treatment is usually extraction of the avulsed tooth and focus on managing the space to prevent malocclusion.

Now, looking at the options (though they're not listed here), the correct answer would be to extract the avulsed primary tooth. The other options might suggest replantation, splinting, or other interventions which are incorrect in this context.

Clinical pearls: Remember that for primary teeth, replantation is not done to avoid damaging the permanent successor. The space management becomes important to maintain arch length. For permanent teeth, the approach is different—replantation is attempted as soon as possible, ideally within 30 minutes, and the tooth is stored in a suitable medium like milk or saline.

So, the correct answer is the one that states extraction of the avulsed primary tooth. The other options would be incorrect for the reasons mentioned.

**Core Concept**
Traumatic avulsion of primary teeth requires distinct management from permanent teeth. Replantation is contraindicated due to risks of injury to the underlying permanent tooth germ, which is still developing.

**Why the Correct Answer is Right**
The treatment of choice for avulsed primary teeth is **immediate extraction** of the avulsed tooth. The root of a primary tooth is physiologically resorbing, and replantation could cause root resorption, infection, or damage to the permanent successor’s follicle. Extraction avoids these complications and simplifies space maintenance.

**Why Each Wrong Option is Incorrect**
**Option A:** *Replantation with splinting* is incorrect because it risks damaging the permanent tooth germ.
**Option B:** *Irrigation and replantation* is invalid for the same reason; primary teeth should never be replanted.
**Option C:** *Pulpotomy* is irrelevant here, as the tooth is completely avulsed, not just pulp-injured.

**Clinical Pearl / High-Yield Fact**
**"Never replant a primary tooth!"** This is a critical rule in pediatric dentistry. Focus on preserving arch space and monitoring for infection. For permanent teeth, replantation is urgent (within 30 minutes) and often required.

**Correct Answer: C. Extract the avulsed tooth**

✓ Correct Answer: D. None of the above