Light reaction or the 'Photochemical' phase include (A)____,(B)____, (C)_____ and formation of (D)_____

Answer

To answer the question regarding the light reaction or the 'Photochemical' phase of photosynthesis, we can break down the components involved in this phase step by step:

### Step-by-Step Solution:

1. **Identify the Process**: The light reaction, also known as the photochemical phase, is the first stage of photosynthesis where light energy is converted into chemical energy.

2. **Absorption of Light (A)**: The first step in the light reaction is the absorption of light. This occurs primarily through chlorophyll pigments present in the chloroplasts of plant cells.

3. **Photolysis of Water (B)**: The second step involves the photolysis of water. This process refers to the splitting of water molecules into hydrogen and oxygen using the energy absorbed from light.

4. **Release of Oxygen (C)**: As a result of the photolysis of water, oxygen is released as a byproduct. This is an essential part of the light reaction as it contributes to the atmospheric oxygen.

5. **Formation of Assimilatory Products (D)**: Finally, the light reaction leads to the formation of assimilatory products, which include ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate). These products are crucial for the subsequent biosynthetic phase of photosynthesis.

### Final Answer:
- (A) Absorption of light
- (B) Photolysis of water
- (C) Oxygen release
- (D) Assimilatory products (ATP and NADPH)