Which of the following statement is correct?

Question

Accepted Answer

The correct option is 3:
Plants evolved both Oxygen and Carbon Dioxide.

**Detailed explanation of why it is correct — include conceptual, or contextual depth:**
Students, this statement is correct because plants engage in two essential biological processes: photosynthesis and cellular respiration. During the day, or when light is available, plants perform **photosynthesis**, where they consume carbon dioxide ($\text{CO}\_2$) and water ($\text{H}\_2\text{O}$) to produce glucose (food) and **evolve oxygen ($\text{O}\_2$)** as a byproduct. However, just like humans, plants also require energy to sustain their life processes 24 hours a day. They achieve this through **cellular respiration**, where they break down the stored glucose using oxygen and release **carbon dioxide ($\text{CO}\_2$)** as a waste product. While the net effect during daylight hours is a massive release of oxygen, they continuously evolve both gases: oxygen during photosynthesis and carbon dioxide during respiration.

**The incorrect option is 1:**
Oxygen and Carbon Dioxide are evolved by both human & plants.
This is incorrect because humans only evolve carbon dioxide as a product of cellular respiration. Humans do not produce or "evolve" oxygen; we constantly consume it.

**The incorrect option is 2:**
Human evolved both oxygen and Carbon Dioxide.
This statement is factually wrong. Humans, being aerobic organisms, primarily perform cellular respiration. This process consumes oxygen and generates carbon dioxide. Therefore, humans only evolve carbon dioxide, not both gases.

**The incorrect option is 4:**
None of the above.
Since option 3 accurately describes the biological processes of plants (evolution of $\text{O}\_2$ during photosynthesis and $\text{CO}\_2$ during respiration), this option is incorrect.