Okay, let's tackle this question about scurvy and radiological signs. First, I need to remember what scurvy is. Scurvy is caused by vitamin C deficiency, right? Vitamin C is essential for collagen synthesis. So when there's a deficiency, collagen can't form properly, leading to various symptoms. The question is asking which radiological sign is NOT seen in scurvy.

Now, the possible radiological signs of scurvy include things like subperiosteal hemorrhage, osteopenia, and metaphyseal irregularities. I think there's something called "white line of Frank" or "scurvy line" which is a radiopaque line in the metaphysis. Also, there's the "corner sign" which is a lucency at the metaphyseal corner.

Wait, the options here are A, B, C, D but they're not labeled in the question provided. But the user provided the correct answer as C, so I need to figure out which options are typically incorrect. Common incorrect options might include signs from other conditions. For example, in rickets, you see cupping and fraying of the metaphyses. So if one of the options is cupping and fraying, that's a sign of rickets, not scurvy. That would be the correct answer here since the question is asking which is NOT seen in scurvy.

Let me verify. Scurvy's radiological features include:
- Subperiosteal hemorrhage
- Metaphyseal irregularities (scurvy line)
- Corner sign (metaphyseal lucency)
- Osteopenia
- Periosteal reaction

Rickets features include:
- Cupping and fraying of metaphyses
- Metaphyseal widening
- Rickets bracelets
- Costochondral junctions (rachitic rosary)

So if an option lists cupping and fraying, that's a sign of rickets, not scurvy. So if the correct answer is C, and the options are A-D with C being cupping and fraying, then that's the one not seen in scurvy. The other options might include the corner sign, scurvy line, or subperiosteal hemorrhage, which are all seen in scurvy.

Therefore, the correct answer is C if that's the option that refers to cupping and fraying. The other options (like subperiosteal hemorrhage, scurvy line, corner sign) are present in scurvy. So the explanation would focus on differentiating scurvy from rickets in terms of radiological signs.

**Core Concept** Scurvy results from vitamin C deficiency, impairing collagen synthesis. Radiologically, it presents with subperiosteal hemorrhage, metaphyseal "white line of Frank," and "corner sign," but not features of rickets.

**Why the Correct Answer is Right** The "corner sign" (metaphyseal lucency) and "white line of Frank" (radiopaque metaphyseal line) are hallmark radiological findings in scurvy due to defective collagen synthesis. Subperiosteal hemorrhage occurs from fragile blood vessels. These findings differ from rickets, where cupping and fraying are classic.

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

✓ Correct Answer: B. Soap bubble appearance