A) Both of them must be aldoses.
B) They are epimers at \[C-3\].
C) The carbon atoms 1 and 2 in both have the same configuration.
D) The carbon atoms 3, 4 and 5 in both have the same configuration.
Correct Answer: D
Solution :
In the formation of osazone, C-1 and C-2 react with phenylhydrazine to form phenylhydrazone. If C-3, C-4, C-5 have same configuration they will form same osazone even if they differ in configuration at C-1 or C-2.
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