Okay, let's tackle this question about the DPT vaccine. The question is asking which statement is incorrect. First, I need to recall what DPT stands for. DPT is the diphtheria, pertussis, and tetanus vaccine. It's a combination vaccine that protects against three diseases.

The core concept here would involve understanding the composition, administration schedule, and adverse effects of the DPT vaccine. The question is testing knowledge on common misconceptions or errors related to this vaccine.

Now, the correct answer is supposed to be the incorrect statement. Let's think about possible incorrect options. For example, one common misconception is that the DPT vaccine is a live vaccine. But actually, it's a toxoid vaccine for diphtheria and tetanus, and the pertussis component is inactivated (acellular). So if an option says it's a live vaccine, that's incorrect.

Another point is the age of administration. The DPT vaccine is typically given in a series starting at 2 months of age. If an option states that it's first given at 6 months, that's wrong. Also, the number of doses in the primary series is usually 3-4 doses. If an option says it's given in two doses, that's incorrect.

Adverse effects: Common side effects include fever, redness at the injection site. A severe but rare adverse effect is seizures, but if an option mentions something like anaphylaxis as a common side effect, that's incorrect because it's rare.

Another possible incorrect statement could be about the vaccine being contraindicated in children with a history of seizures. However, the vaccine is generally safe unless there's a specific contraindication like a severe allergic reaction.

Putting this together, the incorrect statement would be one that misrepresents the vaccine type, administration schedule, or adverse effects. For example, if an option claims that DPT is a live vaccine, that's the incorrect statement. Alternatively, if an option states that it's given as a single dose, that's wrong since it's a series.

I need to structure the explanation with the core concept first, then explain why the correct answer is right, then each wrong option. The clinical pearl should highlight a key fact, like the vaccine type or administration schedule.

**Core Concept**
The Diphtheria-Pertussis-Tetanus (DPT) vaccine is a **acellular** (inactivated) vaccine containing **toxoids** for diphtheria and tetanus and **inactivated pertussis bacteria**. It is administered as a primary series in early childhood, with booster doses later. Key points include its **non-live** nature, **common side effects** (e.g., fever, local reactions), and **contraindications** (e.g., anaphylaxis to prior doses).

**Why the Correct Answer is Right**
The incorrect statement in the question is likely related to a **misconception about the vaccine’s composition or administration**. For example, if an option claims DPT is a **live vaccine**, this is false because all components are **inactivated/toxoids**. The pertussis component is **acellular**, not whole-cell, reducing adverse effects compared to older whole-cell vaccines. This distinction is critical for understanding safety profiles and contraindications.

**Why Each Wrong Option is Incorrect**
**Option A

✓ Correct Answer: A. It should be stored in deep freezer