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                              Q:
                           
                           
                                                      | A) Aldoses and ketoses differ in the position of their hydroxyl groups. | B) Monosaccharides can be classified according to the spatial arrangement of their atoms. | 
| C) All monosaccharides contain carbon, hydrogen, oxygen, and nitrogen atoms. | D) A six-carbon sugar is called a pentose. | 
                              Answer:   B) Monosaccharides can be classified according to the spatial arrangement of their atoms. 
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
Monosaccharides, also called simple sugars, are the most basic units of carbohydrates. They are fundamental units of carbohydrates and cannot be further hydrolyzed to simpler compounds.
Hence, Monosaccharides can be classified according to the spatial arrangement of their atoms is true about Monosaccharides.
 
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