**Core Concept**
The question revolves around the hierarchy of authority and responsibility in a dental clinic, specifically focusing on the role of auxiliary personnel and the clearance process.

**Why the Correct Answer is Right**
In a dental clinic, auxiliary personnel, such as dental hygienists or dental assistants, perform various duties under the supervision and direction of a licensed dentist. After completing their tasks, they hand over the patient to the dentist for final clearance before the patient is discharged. This ensures that the dentist has reviewed the patient's treatment plan and has given clearance for the patient to leave the clinic. This process is crucial for maintaining patient safety and ensuring that all necessary treatments have been completed.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because auxiliary personnel do not perform duties independently without the direction of a licensed dentist.
**Option B:** Incorrect because the patient is not sent after clearance from auxiliary personnel, but rather from the dentist.
**Option C:** Incorrect because this option is incomplete and does not accurately describe the hierarchy of authority in a dental clinic.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that auxiliary personnel in a dental clinic are responsible for performing duties under the supervision of a licensed dentist, and patients are not cleared for discharge until the dentist has reviewed their treatment plan.

**Correct Answer: D. The dentist**