Final answer:
The final oxidation number of carbon in the chemical reaction 6CO₂ + 6H₂O -> C₆H₁₂O₆ + 6O₂ is 4.
Step-by-step explanation:
In this chemical reaction, the final oxidation number of carbon can be determined by assigning oxidation numbers to the elements in the compounds involved. In CO₂, since oxygen has an oxidation number of -2, the carbon atom must have an oxidation number of +4 in order to balance the charges. Therefore, the correct answer is E. 4.