Vaccine which must be stored in the freecer compament of a fridge is / are-
**Core Concept**
The question tests the knowledge of vaccine storage requirements, specifically focusing on the need for freezer storage to maintain vaccine potency. Vaccines are biological products that require strict temperature control to ensure their effectiveness.
**Why the Correct Answer is Right**
Certain vaccines, such as the Oral Poliovirus Vaccine (OPV) and some forms of the Influenza vaccine, require storage at freezer temperatures to maintain their viability. This is because these vaccines contain live, attenuated viruses that are sensitive to temperature fluctuations.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because while some vaccines require refrigeration, not all need freezer storage.
**Option B:** Incorrect as it is not specified, and the question is about vaccines requiring freezer storage.
**Option C:** Incorrect because, similar to Option A, it does not accurately represent vaccines needing freezer conditions.
**Option D:** Incorrect as the option is not provided, but typically, not all vaccines require freezer storage.
**Clinical Pearl / High-Yield Fact**
It's crucial to remember that improper storage of vaccines can lead to a loss of potency, resulting in reduced immune responses in vaccinated individuals.
**Correct Answer:** Correct Answer: D. Oral Poliovirus Vaccine.