C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy (ATP and heat) reaction occurs in

Correct option is B

The given reaction represents the oxidative breakdown of glucose in the presence of oxygen to release usable energy. During this process, chemical energy is converted into ATP and heat, which are essential for cellular activities. This complete oxidation of glucose occurs in living cells and is known as respiration.
Information booster: Respiration is a vital metabolic process that supplies energy for growth, maintenance, and reproduction in all living organisms. It mainly takes place in the mitochondria, where ATP is synthesized through a series of enzyme-controlled reactions. Respiration occurs continuously, day and night, unlike photosynthesis which depends on sunlight. The energy released during respiration supports physiological and biochemical processes in plants and animals.
Why other options are incorrect: (a) Photosynthesis involves synthesis of glucose using carbon dioxide and water, not its breakdown. (c) Evaporation is a physical process of water loss and does not involve energy production in cells. (d) Evapotranspiration refers to combined water loss from soil and plants, not a biochemical reaction.