A monosaccharide containing an aldehydic group is known as......

Explanation

To answer the question, "A monosaccharide containing an aldehydic group is known as...", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Monosaccharides**:
- Monosaccharides are the simplest form of carbohydrates and consist of a single sugar unit. They can be classified based on the functional groups they contain.

2. **Identifying Functional Groups**:
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