Which of the following oxides are amphoteric?
`(i) Tl_(2)O`
`(ii) Al_(2)O_(3)`
`(iii) Ga_(2)O_(3)`
`(iv) In_(2)O_(3)`

Options

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

Explanation

To determine which of the given oxides are amphoteric, we will analyze each oxide based on its properties. Amphoteric oxides are those that can react with both acids and bases, exhibiting both acidic and basic behavior.

### Step-by-Step Solution:

1. **Identify the Oxides:**
The oxides in question are:
- (i) \( \text{Tl}_2\text{O} \)
- (ii) \( \text{Al}_2\text{O}_3 \)
- (iii) \( \text{Ga}_2\text{O}_3 \)
- (iv) \( \text{In}_2\text{O}_3 \)

2. **Analyze Each Oxide:**
- **(i) \( \text{Tl}_2\text{O} \)**: Thallium oxide is known to be strongly basic. It does not exhibit amphoteric behavior.
- **(ii) \( \text{Al}_2\text{O}_3 \)**: Aluminum oxide is amphoteric. It can react with both acids (forming salts) and bases (forming aluminate ions).
- **(iii) \( \text{Ga}_2\text{O}_3 \)**: Gallium oxide is also amphoteric. Similar to aluminum oxide, it can react with acids and bases.
- **(iv) \( \text{In}_2\text{O}_3 \)**: Indium oxide is primarily considered to be basic, but it can show some amphoteric characteristics under certain conditions. However, it is not as commonly recognized as amphoteric as \( \text{Al}_2\text{O}_3 \) and \( \text{Ga}_2\text{O}_3 \).

3. **Conclusion:**
Based on the analysis, the oxides that are amphoteric are:
- \( \text{Al}_2\text{O}_3 \) (ii)
- \( \text{Ga}_2\text{O}_3 \) (iii)

Thus, the answer is (ii) and (iii).

### Final Answer:
The amphoteric oxides among the given options are \( \text{Al}_2\text{O}_3 \) and \( \text{Ga}_2\text{O}_3 \).