If onions are peeled in air, the reaction below is believed to happen: $2\text{CH}_3\text{CH}_2\text{CH}=\text{S}=\text{O} + 2\text{H}_2\text{O} + 2[\text{O}] \rightarrow \text{H}_2\text{SO}_4 + \text{H}_2\text{S} + 2\text{CH}_3\text{CH}_2\text{CHO}$ Which of these tests would produce a positive result with the organic product?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only