First, I need to recall the key points about FFP. FFP is plasma that's been frozen within 8 hours of collection, right? It's used to replace clotting factors. So, the core concept here is the use and characteristics of FFP in clinical settings.

The correct answer is probably one of the options that contradicts a known fact about FFP. Let's think about common misconceptions. For example, FFP is often used for vitamin K deficiency, but wait, FFP doesn't contain vitamin K. That's a common mistake. Or maybe the storage duration? FFP is stored at -18°C for up to 1 year. Also, it contains all coagulation factors except for factors V and VIII, which are unstable. Wait, no—factor V and VIII are present but their levels decrease over time if stored longer.

Looking at the options, if one of them says FFP is used for vitamin K deficiency, that's incorrect because FFP doesn't have vitamin K. Another wrong option might be about the storage temperature—like saying it's stored at 4°C, which is wrong because it needs to be frozen. Also, FFP is not used for volume expansion; that's the role of other fluids like albumin or normal saline.

Clinical pearls: Remember that FFP is for coagulopathy with known factor deficiencies, not for volume. Also, vitamin K is given for deficiency, not FFP. The high-yield fact here is that FFP doesn't contain vitamin K and shouldn't be used for that purpose.

**Core Concept**
Fresh frozen plasma (FFP) is a blood product containing labile coagulation factors (II, V, VII, IX, X, XI, XII) and proteins. It is indicated for replacement therapy in coagulopathy due to factor deficiency, not for volume expansion or vitamin K deficiency.

**Why the Correct Answer is Right**
FFP is stored at -18°C for up to 12 months and must be transfused within 24 hours once thawed. It lacks vitamin K, which is essential for synthesizing clotting factors II, VII, IX, and X. Vitamin K deficiency requires supplementation, not FFP.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect if it claims FFP is used for vitamin K deficiency (FFP lacks vitamin K).
**Option B:** Incorrect if it states FFP is stored at 4°C (FFP requires freezing at -18°C).
**Option C:** Incorrect if it suggests FFP is a volume expander (FFP is reserved for coagulation factor replacement).
**Option D:** Incorrect if it claims FFP contains all clotting factors (factors V and VIII degrade over time in stored FFP).

**Clinical Pearl / High-Yield Fact**
FFP is not a first-line treatment for coagulopathy in vitamin K deficiency. Administer vitamin K for such cases. Remember: "FFP freezes clotting factors, not vitamins."

**Correct Answer: [Letter]. [Answer Text]**