Assertion (A): Digestion breaks large complex molecules to simple smaller molecules which can be easily absorbed.
Reason (R): Digestion is necessary for the absorption of all molecule

Options

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false and R is true.

Explanation

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that digestion breaks down large complex molecules into smaller, simpler molecules that can be easily absorbed by the body.
- This is true because digestion is a crucial process that transforms food into absorbable units, such as amino acids, fatty acids, and simple sugars.

2. **Understanding the Reason (R)**:
- The reason states that digestion is necessary for the absorption of all molecules.
- This statement is incorrect because not all molecules require digestion to be absorbed. For example, simple sugars like glucose and certain vitamins can be absorbed directly without the need for digestion.

3. **Evaluating the Relationship**:
- Since the assertion is true and the reason is false, we need to determine how they relate to each other.
- The reason does not correctly explain the assertion because there are exceptions where molecules can be absorbed without digestion.

4. **Conclusion**:
- The correct answer is that the assertion is true, but the reason is false.

### Final Answer:
- The assertion (A) is true, and the reason (R) is false.