The major product $(B)$ in this reaction is:

How many isomers of $C_4H_{11}N$ are secondary amines?

The preferred sites of protonation in the following compounds are:
$(i)$ $CH_3CONHCH_3$
(ii) $2$-aminopyridine

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Experimental reaction of $CH_{3}Cl$ with aniline and anhydrous $AlCl_{3}$ does not give $o-$ and $p-$methylaniline.
Reason $(R)$: The $-NH_{2}$ group of aniline becomes deactivating because of salt formation with anhydrous $AlCl_{3}$ and hence yields $m-$methylaniline as the product.
In the light of the above statements,choose the most appropriate answer from the options given below.

$R-CONH_2 \xrightarrow[\Delta]{KOBr} R-NH_2$. The correct statement about the product is:

In the above conversion of compound $(X)$ to product $(Y)$,the sequence of reagents to be used will be: