## Core Concept
The question pertains to the nutritional consequences following peptic ulcer surgeries, specifically excluding vagotomy. Peptic ulcer surgeries can lead to various nutritional deficiencies due to changes in gastrointestinal anatomy and physiology.

## Why the Correct Answer is Right
Gastrectomy, a surgical procedure that involves the removal of part or all of the stomach, can lead to several nutritional consequences. These include **malabsorption of nutrients**, particularly **vitamin B12 deficiency** due to the lack of intrinsic factor production in the stomach, **iron deficiency** due to impaired absorption, and **malabsorption of fats and fat-soluble vitamins**.

## Why Each Wrong Option is Incorrect
- **Option A:** While certain surgeries can lead to issues with **carbohydrate absorption**, this is not as directly related to gastrectomy or peptic ulcer surgeries as other options.
- **Option B:** **Protein malnutrition** can occur but is more of a general consequence of malabsorption rather than specific to peptic ulcer surgeries.
- **Option C:** This option seems to relate to a consequence but is not detailed; however, given the context, **weight loss and malnutrition** are common but not listed as an option here.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that patients who undergo **gastrectomy** require lifelong **vitamin B12 injections** to prevent deficiency, as the stomach's parietal cells, which produce intrinsic factor necessary for vitamin B12 absorption, are reduced or absent.

## Correct Answer: D.