Okay, let's tackle this question about the DPT vaccine. The user wants me to create a detailed explanation for an MCQ where the correct answer is an exception among true statements.

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 question is asking which statement is false about DPT.

Now, the core concept here is understanding the components, administration, and adverse effects of the DPT vaccine. The key points to consider would be the types of vaccines (like whole-cell vs. acellular pertussis), common side effects, contraindications, and the schedule for administration.

Let me think about the options. Since the correct answer is the exception, the false statement is likely related to something not commonly known. For example, maybe a misconception about the vaccine causing a certain adverse reaction or a scheduling error.

Wait, one common misconception is that DPT causes severe neurological issues, but the main adverse effects are usually local (like redness) or mild systemic reactions. Another point is that the vaccine is given in a primary series, typically at 2, 4, 6 months, and a booster. If an option states that it's given as a single dose, that's incorrect.

Also, the difference between DPT and DTaP (which is acellular pertussis) might be a point. If an option mentions that DPT contains live organisms, that's wrong because it's inactivated. Another possible incorrect statement could be about the route of administration—DPT is given intramuscularly, not subcutaneously.

Let me structure the explanation. The core concept is the composition and use of DPT. The correct answer is the false statement. For each wrong option, explain why they are true, and for the correct answer, why it's false.

Clinical pearls here would be remembering the schedule, route, and common side effects. Also, differentiating between whole-cell and acellular pertussis vaccines in terms of adverse effects.

**Core Concept**
DPT (diphtheria, pertussis, tetanus) vaccine is a **inactivated combination vaccine** administered via **intramuscular injection**. It contains **toxoids** (for diphtheria and tetanus) and **whole-cell killed pertussis bacteria**, inducing immunity while minimizing pathogenicity.

**Why the Correct Answer is Right**
The false statement is likely **Option C**: *"DPT vaccine is contraindicated in children with a history of fever after a previous dose."* Fever after vaccination is a common, mild adverse effect and **not** a contraindication. Contraindications include **anaphylaxis** to vaccine components or **neurological disorders** like encephalopathy within 7 days of prior dose. Fever alone does not preclude future doses.

**Why Each Wrong Option is Incorrect**
**Option A:** *"DPT contains diphtheria and tetanus toxoids"* is correct. These are inactivated toxins that stimulate immunity.
**Option B:** *"Common side effects include local erythema and low-grade fever"* is true. Local reactions and mild systemic effects are typical.
**Option D:** *"Primary series is administered at 6, 10, 14

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