$$A$$ and $$B$$ in the following reactions are :

When $$m$$-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are)

In this reaction :
CH₃CHO + HCN $$ \to $$ CH₃CH(OH)CN
           $$\buildrel {HOH} \over \longrightarrow $$ CH₃CH(OH)COOH
an asymmetric centre is generated. The acid obtained would be

are