Thank you for reporting, we will resolve it shortly
Q.
In fructose and glucose the possible optical isomers are
Biomolecules
Solution:
Fructose contains three chiral carbon atom and glucose contain 4 chiral carbon atoms.
The Number of possible Optical isomers for Fructose are $2^{3}=8$
The Number of possible Optical isomers for Glucose are $2^{4}=16$
8,16 is the Answer