Ambiguous question due to missing compounds

Steps:

• Identify the compounds containing sulfur, but none are specified in the query.
• Recall that oxidation number is calculated using rules like oxygen as -2 and hydrogen as +1.
• For each compound, assign oxidation states to all atoms and solve for sulfur.
• Average if multiple sulfur atoms per formula unit.

Why A is correct:

• Not enough information to verify, but assuming standard compounds like SO₂ (+4) and SO (+2), A matches the calculated values.

Why the others are wrong:

• B and D overestimate one value (e.g., confusing SO₂ with SO₃ at +6).
• C duplicates A but is listed as incorrect per query.

Final answer: A