Assertion (A) People taking a lot of salty food experience the puffiness or swelling called edema.
Reason ( R) There is water retention in tissue cells and intercellular spaces because of osmosis.

Options

A. Both A and R correct, R is the correct explanation of A
B. Both A and R correct, R is not the correct explanation of A
C. A is correct, R is incorrect
D. R is correct, A is incorrect

Answer

To analyze the assertion and reason provided in the question, we can break it down into a step-by-step solution.

### Step 1: Understand the Assertion
The assertion states that people who consume a lot of salty food experience puffiness or swelling known as edema.

**Explanation**:
- Edema is a condition characterized by an excess of watery fluid collecting in the cavities or tissues of the body. It is often associated with high salt intake because salt (sodium) can cause the body to retain water.

### Step 2: Understand the Reason
The reason given is that there is water retention in tissue cells and intercellular spaces due to osmosis.

**Explanation**:
- Osmosis is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. When a person consumes a lot of salt, the sodium concentration in the blood increases, leading to a higher osmotic pressure. This causes water to move from the cells into the interstitial spaces to balance the concentration, resulting in swelling or edema.

### Step 3: Analyze the Relationship Between Assertion and Reason
Both the assertion and the reason are true statements. The assertion correctly identifies the consequence of high salt intake (edema), and the reason accurately explains the physiological process (water retention due to osmosis) that leads to this condition.

### Conclusion
Since both the assertion and the reason are true, and the reason correctly explains the assertion, we can conclude that the statement is valid.

### Final Answer
Both Assertion (A) and Reason (R) are true, and R explains A.

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