Which of the following is used as a hypnotic?

Which of the following does not give Fehling solution test?

In which of the following reactions is the product formed the same?

$C_{7}H_{10}O$ reacts with $CH_{3}MgBr$ to give a compound $C_{8}H_{12}O$ which gives a positive iodoform test. Identify the structure of $A$.

Benzyl alcohol is obtained from benzaldehyde by:

Which one of the following reactions can be used for the preparation of $\beta$-hydroxy acid derivatives?