Examine the equation of the photosynthesis below. Carbon dioxide + water [right arrow] ? + oxygen

The equation for photosynthesis can be summarized as:

\[ \text{Carbon dioxide} + \text{Water} \rightarrow \text{Glucose} + \text{Oxygen} \]

In this process, light energy (usually from the sun) is absorbed by plants and is converted into chemical energy in the form of glucose. Additionally, oxygen is released as a by-product.

Therefore, the correct answer is:

**C. Light energy is entering and chemical energy is exiting.**