Correct option:(D)Oxygen
Solution:
- ATP is produced during the process of oxidative phosphorylation in the mitochondria.
- It is a part of aerobic respiration.
- Electron transport chain plays an important role in this process.
- Electrons move through a series of electron donors and carriers that lead to the formation of a potential gradient.
- Gradient helps in ATP synthesis.
- During process, oxygen is reduced by the hydrogen from NADH and it finally accepts the electron in the chain.
- So,it is the terminal electron acceptor that results in the formation of water molecules.