In presence of high concentration of oxygen, RuBP carboxylase converts RuBP to
The reaction catalyzed by ribulose bisphosphate carboxylase/ oxygenase.
When rubisco binds oxygen to RuBP, the RuBP is essentially split in half to a 3 carbon piece and a 2 carbon fragment according to the following reaction:
RuBP + oxygen + rubisco → PGA (C3)+ phosphoglycolate (C2).
So, the correct option is 'PGA and phosphoglycolate'.