**Core Concept**
Parenteral alimentation, also known as total parenteral nutrition (TPN), is a method of providing essential nutrients to patients through intravenous administration. Trace minerals, including zinc, copper, manganese, and selenium, are essential for various bodily functions, including enzyme activity, immune response, and antioxidant defenses. Deficiencies in these minerals can lead to various clinical manifestations and complications.

**Why the Correct Answer is Right**
The most frequent trace mineral deficiency developing in patients receiving parenteral alimentation is a deficiency of selenium. Selenium is an essential component of the enzyme glutathione peroxidase, which plays a crucial role in protecting cells from oxidative damage. Parenteral alimentation often lacks adequate selenium supplementation, leading to a deficiency. This can result in muscle weakness, fatigue, and increased susceptibility to infections.

**Why Each Wrong Option is Incorrect**
**Option A:** Zinc deficiency is also a potential complication of parenteral alimentation, but it is less common than selenium deficiency. Zinc is essential for immune function and wound healing, but its deficiency does not typically manifest as frequently as selenium deficiency in TPN patients.
**Option B:** Copper deficiency is rare in patients receiving parenteral alimentation, as it is often supplemented in TPN formulations. Copper is essential for connective tissue health and immune function, but its deficiency is not as common as selenium deficiency in this context.
**Option C:** Manganese deficiency is also possible in patients receiving parenteral alimentation, but it is not as frequent as selenium deficiency. Manganese is essential for bone health and metabolism, but its deficiency is less commonly encountered in TPN patients.

**Clinical Pearl / High-Yield Fact**
Selenium deficiency is often referred to as "cardiomyopathy in a bottle," highlighting the importance of adequate selenium supplementation in parenteral alimentation to prevent this serious complication.

**Correct Answer:** A. Zinc.