This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following is Aldosugar ? 
Select and explain. 
A. Fructose, B. Erythrulose, C. Glucose, D. None
C: Glucose
Answer: C: Glucose 
Explanation: Ans. is `c' i.e., Glucose SugarNumber of carbon atoms Aldoses (Aldosugars)Ketoses (ketosugars)Trioses2 GlyceraldehydeDihydroxyacetoneTetroses4 ErythroseErythrulosePentoses5 Ribose, XyloseRibulose, xyluloseHexoses6 Glucose, galactase, mannoseFructoseHeptoses7 GlucoheptoseSedoheptulose