Inputs and outputs of the light reactions

From the following choices, identify those that are the inputs and outputs of the light reactions. (Recall that inputs to chemical reactions are modified over the course of the reaction as they are converted into products. In other words, if something is required for a reaction to occur, and it does not remain in its original form when the reaction is complete, it is an input.)

Drag each item to the appropriate bin. If the item is not an input to or an output from the light reactions, drag it to the "not input or output" bin.
Input: NADP+, ADP, water, light

Output: ATP, NADPH, O2

Not input or output: CO2, G3P, glucose

Photosynthetic process is a unique process undergone by autotrophs like plants in their Chloroplast. It involves two major stages viz: light stage and light-independent stage. The light stage is the stage that requires energy from sunlight in order to occur. It occurs when photons of light (input) from the sun strikes Chlorophyll pigments in the Chloroplast. This ignites the Chlorophyll molecule and makes it excited. The excited state of the chlorophyll molecule releases electrons that split water molecules (input) in a process called PHOTOLYSIS OF WATER, into hydrogen ions, electrons and oxygen.

The hydrogen ions is accepted by the NADP+ (input) molecule and reduces it to NADPH (output). Also, the electron generated creates a proton pump in the thylakoid membrane that powers the phosphorylation of ADP (input) into ATP (output). During the light reaction, specifically, PHOTOLYSIS OF WATER, oxygen gas (output) is given off.

Note that C02, G3P and glucose are neither inputs nor outputs of the light stage. They are rather involved in the next stage of the photosynthetic process, which is light-independent stage or Calvin Cycle.