**Core Concept**
The question is testing the student's understanding of glucogenic amino acids, which are those that can be converted into glucose through gluconeogenesis. Gluconeogenesis is a metabolic pathway that generates glucose from non-carbohydrate sources, such as amino acids, lactate, and glycerol. Glucogenic amino acids are typically those that can be converted into pyruvate or other gluconeogenic precursors.

**Why the Correct Answer is Right**
Lysine is a ketogenic amino acid, meaning it is converted into acetyl-CoA or acetoacetyl-CoA, which are not typically used for gluconeogenesis. Instead, lysine is metabolized through the Krebs cycle and is not a direct precursor for glucose production. In contrast, the other options (arginine, histidine, and glycine) can be converted into intermediates that feed into the gluconeogenic pathway, making them glucogenic.

**Why Each Wrong Option is Incorrect**
**Option A:** Arginine can be converted into alpha-ketoglutarate, which is a gluconeogenic intermediate. Therefore, arginine is glucogenic.
**Option B:** Histidine can be converted into alpha-ketoglutarate, similar to arginine, making it glucogenic as well.
**Option C:** Glycine is a glucogenic amino acid that can be converted into serine, which is then converted into pyruvate, a key gluconeogenic precursor.

**Clinical Pearl / High-Yield Fact**
The distinction between glucogenic and ketogenic amino acids is important in clinical settings, particularly in the management of patients with diabetes or those undergoing surgery. Ketogenic amino acids can contribute to ketosis, while glucogenic amino acids can help maintain glucose levels. Remembering that lysine is ketogenic can help guide nutritional support and avoid exacerbating ketosis.

✓ Correct Answer: D. Lysine