**Core Concept**
The question tests the understanding of vaccine storage requirements, specifically the distinction between vaccines that require freezer storage and those that do not. Vaccine potency and efficacy can be compromised if stored improperly.

**Why the Correct Answer is Right**
The correct answer is based on the specific storage requirements of each vaccine type. Most inactivated vaccines and live attenuated vaccines have different storage needs. Typically, live vaccines require freezer storage to maintain their potency.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because some vaccines indeed require freezer storage.
**Option B:** Incorrect as it might be a vaccine type that needs refrigeration, not necessarily room temperature.
**Option C:** Incorrect, as this could be a vaccine that requires refrigeration.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that live vaccines usually require freezer storage, while inactivated vaccines can often be stored in refrigerators. Incorrect storage can lead to decreased vaccine efficacy.

**Correct Answer:** D. Oral Polio Vaccine