How Could a Carbon Atom That Was Originally Present in a Glucose

Multiple Choice

How could a carbon atom that was originally present in a glucose molecule end up in a purine base that becomes incorporated in a molecule of DNA?

A) Glucose  acetyl CoA amino acid citric acid cycle gluconeogenesis purine base  DNA
B) Glucose  glycerol triglyceride  acetyl CoA  pyrimidine base purine base  DNA
C) Glucose  pyruvate acetyl CoA  fatty acid  triglyceride  purine base  DNA
D) Glucose  acetyl CoA citric acid cycle  amino acid  purine base  DNA
E) Glucose  pyruvate lactic acid pyrimidine base amino acid  purine base  DNA