Grignard reagent reacts with compounds containing which of the following groups?

Given below are two statements: Consider the following reaction: $R_2C=O + H_2O \rightleftharpoons R_2C(OH)_2$.
Statement $I$: In the case of formaldehyde $(HCHO)$,$K_{eq}$ is about $2280$,due to small substituents,hydration is faster.
Statement $II$: In the case of trichloroacetaldehyde $(CCl_3CHO)$,$K_{eq}$ is about $2000$ due to the $-I$ effect of $-Cl$ atoms.
In the light of the above statements,choose the correct answer from the options given below:

Aldehydes and ketones can be reduced to hydrocarbons by using:

What is the first intermediate formed during the reduction of carbonyl compounds by $H_2NNH_2$ and $KOH$?

Which of the following products will be obtained in the given (consider minor product also) Beckmann rearrangement?

The reaction $R-C(=O)-R + HCN \xrightarrow{\text{catalyst}} R-C(OH)(CN)-R$ is a nucleophilic addition reaction. Which of the following can be used as a catalyst in the above reaction?