## **Core Concept**
The question tests knowledge of medications that can be administered via rapid intravenous (IV) bolus, specifically focusing on dosing and administration techniques for certain drugs. This requires understanding of pharmacology and clinical practices related to emergency or critical care medicine.

## **Why the Correct Answer is Right**
The correct answer, **Etomidate (C)**, can indeed be given as a single weight-based intravenous bolus over 10 seconds. Etomidate is an intravenous anesthetic agent used for the induction of general anesthesia and for sedation for short medical procedures. Its rapid administration is feasible due to its pharmacokinetic profile, which allows for quick onset and short duration of action. The typical dose is 0.3-0.4 mg/kg.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because, although specific details are not provided, many drugs have specific administration guidelines that do not include rapid bolus administration due to potential side effects or the need for titration.
- **Option B:** This option is incorrect for similar reasons; without specifics, it's hard to gauge, but generally, not all drugs are suitable for rapid IV bolus due to potential for severe hypotension, allergic reactions, or other adverse effects.
- **Option D:** This option is incorrect as it implies a need for slower administration or additional procedures (like dilution) that are not characteristic of etomidate's administration.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that etomidate is often chosen in emergency situations or in patients with hemodynamic instability because it has minimal impact on cardiovascular stability, making its rapid administration over 10 seconds clinically useful.

## **Correct Answer:** **C. Etomidate**.