[A]: Perfluorocarbon can act as the substitute of blood.
[R]: Perfluorocarbon has some properties of blood

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

To solve the question regarding the assertion (A) and reason (R) about perfluorocarbon as a substitute for blood, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Blood Functions**:
- Blood performs several critical functions in the body, including the transportation of gases (oxygen and carbon dioxide), providing immune responses, and facilitating coagulation (clotting).
- Hemoglobin, a protein in red blood cells, is primarily responsible for the transport of oxygen.

**Hint**: Recall the main functions of blood and the role of hemoglobin in gas exchange.

2. **Introduction to Perfluorocarbon**:
- Perfluorocarbons (PFCs) are synthetic compounds that have the ability to dissolve and transport gases, particularly oxygen and carbon dioxide, similar to blood.
- They are not a complete substitute for blood since they do not provide immune responses or coagulation functions.

**Hint**: Consider the properties of perfluorocarbons and how they relate to blood functions.

3. **Evaluating Assertion (A)**:
- The assertion states that perfluorocarbon can act as a substitute for blood. This is true in specific medical situations, such as when there is a loss of blood and matching blood is not available.
- Therefore, assertion (A) is correct.

**Hint**: Think about situations where blood substitutes might be necessary and how perfluorocarbons can fulfill that role.

4. **Evaluating Reason (R)**:
- The reason states that perfluorocarbon has some properties of blood. This is also true, as PFCs can transport gases, which is a key property of blood.
- However, it should be noted that while PFCs share some properties with blood, they do not replicate all functions of blood.

**Hint**: Identify the similarities and differences between perfluorocarbon and blood.

5. **Conclusion**:
- Both the assertion (A) and reason (R) are true. The reason correctly explains why perfluorocarbon can be considered a substitute for blood, focusing on its gas transport properties.
- Therefore, the correct answer is that both A and R are true and R is a correct explanation of A.

**Hint**: Review the relationship between assertion and reason to confirm their correctness.

### Final Answer:
Both assertion (A) and reason (R) are true, and R correctly explains A.