In a galvanic cell, the salt bridge
(i) does not participate chemically in the cell reaction
(ii) stops the diffusion of ions from one electrolytes to another
(ii) is necessary for the occurrence of the cell reaction
(iv) ensures mixing of the two elecrolytic solutions

Options

A. `(i), (ii), (iii), (iv)`
B. `(i), (iii), (iv)`
C. `(i), (ii),(iii)`
D. `(i), (iii)`

Explanation

To analyze the role of the salt bridge in a galvanic cell, we can break down the question into several key points and evaluate each statement provided.

### Step-by-Step Solution:

1. **Understanding the Role of the Salt Bridge:**
- The salt bridge is a crucial component of a galvanic cell. Its primary function is to maintain electrical neutrality in the half-cells by allowing the flow of ions.

2. **Evaluating Statement (i): "The salt bridge does not participate chemically in the cell reaction."**
- This statement is **true**. The salt bridge contains an inert electrolyte (like KCl or Na2SO4) that does not take part in the redox reactions occurring at the electrodes.

3. **Evaluating Statement (ii): "The salt bridge stops the diffusion of ions from one electrolyte to another."**
- This statement is **false**. The salt bridge allows the movement of ions between the two half-cells to maintain charge balance, thus preventing the buildup of charge that would stop the cell reaction.

4. **Evaluating Statement (iii): "The salt bridge is necessary for the occurrence of the cell reaction."**
- This statement is **true**. The salt bridge is essential for the completion of the circuit and allows the flow of ions, which is necessary for the redox reactions to proceed.

5. **Evaluating Statement (iv): "The salt bridge ensures mixing of the two electrolytic solutions."**
- This statement is **false**. The salt bridge does not ensure mixing of the two solutions; rather, it separates them while allowing ionic movement to maintain charge neutrality.

### Summary of Evaluations:
- (i) True
- (ii) False
- (iii) True
- (iv) False

### Conclusion:
The correct statements regarding the salt bridge in a galvanic cell are (i) and (iii).