Among the following, which is/are required for photosynthesis? (i) `CO_2` (ii) `H_2O ` (iii) Sunlight (iv) Chlorophyll

Options

A. (i) and (ii)
B. (ii) and (iii)
C. (i), (ii), (ii) and (iv)
D. Only (iii)

Explanation

To determine which of the given options are required for photosynthesis, let's analyze each component step by step.

### Step 1: Understand Photosynthesis
Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose (food) using carbon dioxide and water. This process occurs mainly in the chloroplasts of plant cells.

### Step 2: Identify the Requirements
The main requirements for photosynthesis are:
1. **Carbon Dioxide (CO₂)**: Plants take in carbon dioxide from the atmosphere through small openings in their leaves called stomata.
2. **Water (H₂O)**: Water is absorbed by the roots from the soil and transported to the leaves.
3. **Sunlight**: Sunlight provides the energy needed for the photosynthesis process. It is absorbed by chlorophyll, the green pigment in plants.
4. **Chlorophyll**: This pigment is essential as it captures sunlight and converts it into chemical energy.

### Step 3: Analyze Each Option
Now, let's analyze the options given in the question:
- (i) **CO₂**: Required for photosynthesis.
- (ii) **H₂O**: Required for photosynthesis.
- (iii) **Sunlight**: Required for photosynthesis.
- (iv) **Chlorophyll**: Required for photosynthesis.

### Step 4: Conclusion
All four components (CO₂, H₂O, Sunlight, and Chlorophyll) are essential for the process of photosynthesis. Therefore, the answer is that all of them are required for photosynthesis.

### Final Answer
(i) CO₂, (ii) H₂O, (iii) Sunlight, (iv) Chlorophyll - All are required for photosynthesis.

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