The option (s) with only amphoteric oxides is (are)

Options

A. `NO, B_(2)O_(3), PbO,SnO_(2)`
B. `Cr_(2)O_(3),CrO, SnO, PbO`
C. `Cr_(2)O_(3), BeO, SnO,SnO_(2)`
D. `ZnO,Al_(2)O_(3),PbO,PbO_(2)`

Explanation

To determine which options contain only amphoteric oxides, we first need to understand what amphoteric oxides are. Amphoteric oxides are those that can react with both acids and bases.

### Step-by-Step Solution:

1. **Definition of Amphoteric Oxides**:
Amphoteric oxides are oxides that can react with both acids and bases. This means they can act as either an acid or a base depending on the reaction conditions.

2. **List of Common Amphoteric Oxides**:
Some common examples of amphoteric oxides include:
- Aluminum oxide (Al₂O₃)
- Zinc oxide (ZnO)
- Chromium(III) oxide (Cr₂O₃)
- Lead(II) oxide (PbO)
- Beryllium oxide (BeO)
- Tin(II) oxide (SnO)
- Tin(IV) oxide (SnO₂)

3. **Identifying Non-Amphoteric Oxides**:
- Non-metal oxides like B₂O₃ are typically acidic.
- Neutral oxides like NO do not react with acids or bases.
- Basic oxides like CrO are not amphoteric.

4. **Analyzing the Options**:
- Check each option provided in the question for the presence of only amphoteric oxides.
- If an option contains any oxide that is not amphoteric (either acidic, basic, or neutral), it cannot be the correct answer.

5. **Conclusion**:
After analyzing the options, we find that options containing only the oxides listed as amphoteric (Al₂O₃, ZnO, Cr₂O₃, PbO, BeO, SnO, SnO₂) are the correct ones.

### Final Answer:
The options with only amphoteric oxides are the third and fourth options.