Oxygen liberated during photosynthesis comes from

Correct answer: water

Explanation: ✅ Correct Answer: A) water 📚 Explanation: During the process of photosynthesis, light energy is used to split water molecules in a process called photolysis. This reaction releases electrons for the plant and produces oxygen as a by-product. The oxygen we breathe from plants actually comes from the water they absorb, not from the carbon dioxide. This was a major discovery in understanding the chemistry of life on Earth.