Which reaction has a product that forms a yellow precipitate when it is treated with alkaline $\text{I}_2(aq)$?
- A2-chloropropane is warmed with a dilute aqueous solution of sodium hydroxide.
- BEthanal is heated under reflux with acidified potassium dichromate(VI).
- CMethyl ethanoate is heated under reflux with dilute sulfuric acid.
- DPropanal is reacted with $\text{NaBH}_4$, followed by dilute sulfuric acid.