Which Statement Is FALSE Concerning Xylulose-5-Phosphate and Ribose-5-Phosphate

Multiple Choice

Which statement is FALSE concerning xylulose-5-phosphate and ribose-5-phosphate?

A) These molecules are isomers of each other.
B) These molecules are both ketopentoses.
C) These molecules can both be generated from ribulose 5-phosphate in a single reaction.
D) In the Calvin cycle, both of these are D enantiomers.
E) None of these statements is false.