**Core Concept**
A prodrug is a pharmacologically inactive compound that undergoes metabolic conversion to a pharmacologically active drug. Prodrugs are designed to improve the bioavailability, stability, or solubility of the active drug.

**Why the Correct Answer is Right**
Enalapril is a prodrug that is metabolized to its active form, enalaprilat, which is an angiotensin-converting enzyme (ACE) inhibitor. Enalaprilat is responsible for the antihypertensive effects of enalapril. The conversion of enalapril to enalaprilat occurs through hydrolysis by esterases in the liver. This process is essential for the therapeutic activity of enalapril.

**Why Each Wrong Option is Incorrect**
**Option A:** Lisinopril is an ACE inhibitor, but it is not a prodrug. It is administered as an active drug and does not require metabolic conversion to exert its therapeutic effects.
**Option C:** Chlorpromazine is a typical antipsychotic medication that belongs to the phenothiazine class. It is not a prodrug and is administered as an active drug.
**Option D:** Dopamine is a catecholamine neurotransmitter that is involved in various physiological processes. It is not a prodrug, and its therapeutic effects are achieved through direct action on dopamine receptors.

**Clinical Pearl / High-Yield Fact**
When encountering a medication that is a prodrug, it is essential to consider the metabolic pathway involved in its conversion to the active form. This knowledge can help in understanding the potential side effects and drug interactions associated with the prodrug.

**✓ Correct Answer: B. Enalapril**