To investigate the pathways of photosynthesis, a researcher grows a plant under conditions where the water supplied is enriched with the heavy oxygen isotope 18O^{18}\text{O}18O, while the carbon dioxide supplied contains only the standard oxygen isotope 16O^{16}\text{O}16O.
Which of the following correctly identifies the isotope of oxygen that will be detected in the synthesised glucose and the released oxygen gas?
Glucose: 18O^{18}\text{O}18O | Oxygen gas: 16O^{16}\text{O}16O
Glucose: 18O^{18}\text{O}18O | Oxygen gas: 18O^{18}\text{O}18O
Glucose: 16O^{16}\text{O}16O | Oxygen gas: 18O^{18}\text{O}18O
Glucose: 16O^{16}\text{O}16O | Oxygen gas: 16O^{16}\text{O}16O
