The element which forms oxides in all oxidation states ` +1 ` to `+5` is.

Options

A. N
B. P
C. As
D. Sb.

Explanation

To solve the question, "The element which forms oxides in all oxidation states from +1 to +5 is," we will analyze the elements in group 15 of the periodic table, which includes nitrogen, phosphorus, arsenic, and antimony.

### Step-by-Step Solution:

1. **Identify the Elements**: The elements in question are nitrogen (N), phosphorus (P), arsenic (As), and antimony (Sb). All these elements belong to group 15 of the periodic table.

2. **Determine Oxidation States**: We need to check which of these elements can exhibit oxidation states from +1 to +5.
- **Nitrogen**:
- Oxidation states: -3, -2, -1, 0, +1, +2, +3, +4, +5
- Forms oxides:
- N2O (oxidation state +1)
- NO (oxidation state +2)
- N2O3 (oxidation state +3)
- NO2 (oxidation state +4)
- N2O5 (oxidation state +5)
- **Phosphorus**:
- Oxidation states: -3, 0, +3, +5
- Forms oxides:
- P4O6 (oxidation state +3)
- P4O10 (oxidation state +5)
- Does not form oxides in +1 or +2 states.
- **Arsenic**:
- Oxidation states: -3, +1, +2, +3, +5
- Forms oxides:
- As2O3 (oxidation state +3)
- As2O5 (oxidation state +5)
- Does not form oxides in +1 or +2 states.
- **Antimony**:
- Oxidation states: -3, +1, +3, +5
- Forms oxides:
- Sb2O3 (oxidation state +3)
- Sb2O5 (oxidation state +5)
- Does not form oxides in +2 states.

3. **Conclusion**: From the analysis, we see that only nitrogen can form oxides in all oxidation states from +1 to +5. Therefore, the answer to the question is nitrogen.

### Final Answer:
The element which forms oxides in all oxidation states from +1 to +5 is **Nitrogen (N)**.