Oxygen will directly react with each of the following elements except

Options

A. P
B. Cl
C. Na
D. S

Explanation

To solve the question "Oxygen will directly react with each of the following elements except," we need to analyze the reactivity of oxygen with the given elements: phosphorus, chlorine, sodium, and sulfur.

### Step-by-Step Solution:

1. **Identify the Elements**: The elements we are considering are phosphorus (P), chlorine (Cl), sodium (Na), and sulfur (S).

2. **Reactivity of Oxygen with Phosphorus**:
- Oxygen reacts with phosphorus to form phosphorus pentoxide (P4O10).
- Reaction:
\[ 4P + 5O_2 \rightarrow P_4O_{10} \]
- Conclusion: Oxygen reacts with phosphorus.

3. **Reactivity of Oxygen with Sodium**:
- Oxygen reacts with sodium to form sodium oxide (Na2O).
- Reaction:
\[ 4Na + O_2 \rightarrow 2Na_2O \]
- Conclusion: Oxygen reacts with sodium.

4. **Reactivity of Oxygen with Sulfur**:
- Oxygen reacts with sulfur to form sulfur dioxide (SO2).
- Reaction:
\[ S + O_2 \rightarrow SO_2 \]
- Conclusion: Oxygen reacts with sulfur.

5. **Reactivity of Oxygen with Chlorine**:
- Oxygen does not react directly with chlorine under normal conditions. The reaction is endothermic and requires energy (heat) to proceed.
- Conclusion: Oxygen does not react with chlorine.

6. **Final Answer**:
- Since oxygen reacts with phosphorus, sodium, and sulfur but does not react with chlorine, the correct answer is **chlorine (Cl)**.

### Summary:
Oxygen will directly react with phosphorus, sodium, and sulfur, but it will not react directly with chlorine.