For process of photosynthesis, all except one of the following items are essential. Point out the exception

Options

A. water, minerals
B. light, chlorophyll
C. `CO_(2)` , optimum temperature
D. `O_(2)`, sucrose

Answer

To determine which item is not essential for the process of photosynthesis, let's analyze each option provided in the question:

1. **Water and Minerals**: Water is essential for photosynthesis as it is one of the raw materials needed for the process. Minerals, while important for plant health, are not directly involved in the photosynthesis reaction itself.

2. **Light and Chlorophyll**: Light is crucial for photosynthesis as it provides the energy needed for the process. Chlorophyll is the pigment that captures light energy, making it essential for photosynthesis.

3. **CO2 and Optimum Temperature**: Carbon dioxide (CO2) is a key reactant in photosynthesis, and an optimum temperature is necessary for the enzymes involved in the process to function effectively.

4. **O2 and Sucrose**: Oxygen (O2) is a byproduct of photosynthesis, not a requirement for the process itself. Sucrose, while a product of photosynthesis, is not essential for the process to occur.

Based on this analysis, the exception among the items listed is **O2 and Sucrose**. Oxygen is not required for photosynthesis to take place, as it is produced during the process.

### Step-by-Step Solution:
1. Identify the key components required for photosynthesis: water, light, chlorophyll, CO2, and optimum temperature.
2. Analyze each option to see if it is essential for the photosynthesis process.
3. Determine that oxygen is a byproduct and sucrose is a product, not a requirement.
4. Conclude that the correct answer is the option that includes **O2 and Sucrose** as they are not essential for photosynthesis.