What is the product when 3-methylpentan-2-one reacts with acidified KCN\text{KCN}KCN?
2-hydroxy-2,3-dimethylpentanenitrile
3-hydroxy-2,3-dimethylpentanenitrile
2-hydroxy-3-methylhexanenitrile
3-hydroxy-2-methylhexanenitrile