**Core Concept**
Scurvy is a disease caused by a deficiency of vitamin C (ascorbic acid) in the diet. Vitamin C plays a crucial role in the synthesis of collagen, a protein essential for the structure and elasticity of connective tissue.

**Why the Correct Answer is Right**
Vitamin C is necessary for the hydroxylation of proline and lysine residues in collagen, which are essential for the stabilization of the collagen triple helix. Without sufficient vitamin C, collagen synthesis is impaired, leading to the characteristic symptoms of scurvy, including poor wound healing, bleeding gums, and joint pain. The body's inability to produce adequate collagen results in the weakening of connective tissue and the characteristic signs of scurvy.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the dietary deficiency of vitamin A can cause night blindness, not scurvy.
* **Option B:** This option is incorrect because the dietary deficiency of vitamin B12 can cause megaloblastic anemia, not scurvy.
* **Option C:** This option is incorrect because the dietary deficiency of vitamin E can cause neurological problems, not scurvy.

**Clinical Pearl / High-Yield Fact**
Scurvy is a classic example of a disease caused by a deficiency of a specific vitamin. It is essential to recognize the symptoms of scurvy, particularly in patients with a history of poor dietary habits or those with malabsorption syndromes.

**Correct Answer:** .