Which of the following sugars can be classified as a ketotetrose? 
Definitions:
Nearsightedness
A common vision condition where close objects appear clearly, but distant ones do not due to the shape of the eye causing light rays to focus incorrectly.
Adulthood
A stage of human development characterized by full physical growth, maturity, and the assumption of adult roles and responsibilities.
Alcohol
A psychoactive substance found in drinks such as beer, wine, and spirits, known for its depressant effect on the central nervous system.
Live Longer
A term referring to the action or phenomenon of having a lifespan that exceeds the average expectancy, often associated with healthy lifestyles and medical advances.
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