Identify the compound obtained when ethyl methyl ketone is treated with $CH_3MgBr$ followed by hydrolysis.

Cannizzaro reaction is an example of:

Given below are two statements:
Statement $I$ : Acidity of $\alpha$-hydrogens of aldehydes and ketones is responsible for Aldol reaction.
Statement $II$ : Reaction between benzaldehyde and ethanal will $NOT$ give Cross-$Aldol$ product.
In the light of above statements,choose the most appropriate answer from the options given below.

Which of the following compounds would not give tert-butyl alcohol when treated with excess methylmagnesium bromide $(CH_3MgBr)$ followed by acid?

The compounds $A$ and $B$ are respectively

Compound $(A)$,$C_6H_{12}O_3$,when treated with $I_2$ in aqueous sodium hydroxide gives a yellow precipitate. When $(A)$ is treated with Tollens' reagent,no reaction occurs. When $(A)$ is hydrolysed and then treated with Tollens' reagent,a silver mirror is formed in the test tube. Compound $(A)$ will be