Which of the following amines is obtained by Gabriel phthalimide synthesis?

For the following compounds,choose the incorrect option?
$CH_3-NH_2 \, \, (P)$
$Ph-NH_2 \, \, (Q)$

An organic compound $A$ on reaction with $NH_{3}$ followed by heating gives compound $B$. Which on further strong heating gives compound $C$ $(C_{8}H_{5}NO_{2})$. Compound $C$ on sequential reaction with ethanolic $KOH$,alkyl chloride and hydrolysis with alkali gives a primary amine. The compound $A$ is.

Aniline is not the major product in one of the following reactions. Identify that reaction.

In acid medium,nitrobenzene is reduced to aniline as shown in the reaction:
$C_6H_5-NO_2 + 6[H] \to C_6H_5-NH_2 + 2H_2O$
The reducing agent used in this reaction is $......$.

In the preparation of a $1^{\circ}$-amine from an alkyl halide,with simultaneous addition of one $-CH_2-$ group to the carbon chain,the reagent used as the source of nitrogen is