**Core Concept**
The management of uncomplicated vivax malaria involves the use of antimalarial drugs that target the erythrocytic stage of the parasite. **Chloroquine** is often considered due to its efficacy against the blood stages of the parasite. However, resistance patterns and the specific lifecycle of *Plasmodium vivax* must be considered.

**Why the Correct Answer is Right**
**Chloroquine** is typically the drug of choice for uncomplicated vivax malaria because it effectively clears the parasitemia by targeting the erythrocytic stages of the parasite. Additionally, **primaquine** is used to eradicate the hypnozoite stage of *P. vivax* to prevent relapse, but **chloroquine** is the primary choice for the acute management of the disease.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because while it might be an antimalarial, it's not specified and thus can't be assumed as the correct choice.
**Option B:** Incorrect as it is not the standard first-line treatment for uncomplicated vivax malaria.
**Option C:** Incorrect because, although it could be part of the treatment regimen, it's not the primary drug for managing the erythrocytic stage of *P. vivax*.
**Option D:** Incorrect as it is not typically used as the first-line treatment for uncomplicated vivax malaria.

**Clinical Pearl / High-Yield Fact**
In areas with **chloroquine resistance**, alternative treatments such as **artemisinin-based combination therapies (ACTs)** may be considered. It's crucial to remember that *P. vivax* has a hypnozoite stage that requires **primaquine** treatment to prevent relapses.

**Correct Answer:** D. Chloroquine