Which of the following statement is not correct ?

Options

A. Formation of oxyhaemoglobin is a process of oxidation
B. Every 100 mL of oxygenated blood can deliver around 5 mL of `O_(2)` tissue under physiological condition
C. Dissociation curve is curve between percentage saturation of Hb with oxygen and partial pressure of oxygen.
D. High concentration of `CO_(2)` actives dissociation of oxyhaemoglobin is called Bohr's effect.

Answer

To determine which statement is not correct among the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The statement is: "Formation of oxyhemoglobin is a process of oxidation."
- **Explanation:** The formation of oxyhemoglobin occurs when hemoglobin binds with oxygen. This process is reversible and does not involve the loss of electrons, which is characteristic of oxidation. Therefore, this statement is incorrect.

2. **Analyze the Second Statement:**
- The statement is: "Every 100 ml of oxygenated blood can deliver around 5 ml of O2 to tissues under physiological conditions."
- **Explanation:** Under normal physiological conditions, it is indeed true that 100 ml of blood can carry approximately 5 ml of oxygen. Thus, this statement is correct.

3. **Analyze the Third Statement:**
- The statement is: "Dissociation curve is a curve between percentage saturation of Hb with oxygen and partial pressure of oxygen."
- **Explanation:** The dissociation curve represents the relationship between the percentage saturation of hemoglobin (Hb) with oxygen and the partial pressure of oxygen (pO2). This statement is also correct.

4. **Analyze the Fourth Statement:**
- The statement is: "High concentration of CO2 activates the dissociation of O2, which is called the Bohr effect."
- **Explanation:** The Bohr effect describes how an increase in carbon dioxide concentration (and a decrease in pH) leads to the release of oxygen from hemoglobin. This statement is correct.

### Conclusion:
The statement that is not correct is the first one: "Formation of oxyhemoglobin is a process of oxidation."