Identify the product '$$A$$' in the following reaction.

$$\text { Aniline } \xrightarrow[\text { Pyridine }]{\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O}} A$$

Alkyl cynides on reduction by sodium and ethanol give primary amines. This reaction is called as

Identify the product obtained, when benzamide is treated with bromine and aqueous sodium hydroxide.

Which of the following is called as mandelonitrile?