**Core Concept**
Exclusive milk ingestion can manifest as a condition known as "scurvy" is incorrect because scurvy is caused by a lack of vitamin C. However, the more accurate concept being tested is the potential for nutritional deficiencies in infants fed exclusively on cow's milk.

**Why the Correct Answer is Right**
Exclusive milk ingestion can lead to a condition known as "scurvy" is incorrect because scurvy is caused by a lack of vitamin C. However, the more accurate concept being tested is the potential for nutritional deficiencies in infants fed exclusively on cow's milk. This is because whole cow's milk is not a complete source of nutrition for infants and lacks essential nutrients like vitamin D, vitamin E, and essential fatty acids. Moreover, cow's milk contains a different type of protein, casein, which can be difficult for infants to digest.

**Why Each Wrong Option is Incorrect**
**Option A:** Scurvy is caused by a lack of vitamin C, not by the exclusive ingestion of milk. Vitamin C is found in limited amounts in cow's milk.
**Option B:** Beriberi is a condition caused by a deficiency of thiamine (vitamin B1), which is not directly related to milk ingestion.
**Option C:** Phryenoderma is not a recognized medical condition.

**Clinical Pearl / High-Yield Fact**
Infants fed exclusively on cow's milk are at risk for developing nutritional deficiencies, including rickets, anemia, and impaired growth and development.

**Correct Answer Line**
✓ Correct Answer: D. None