By reduction of nitrosobenzene,which of the following is not obtained?

The number of secondary amines with the molecular formula $C_4H_{11}N$ is

The product $(A)$ is:

Identify the product $C$ in the series:
$CH_3CN$ $\xrightarrow{Na/C_2H_5OH} A$ $\xrightarrow{HNO_2} B$ $\xrightarrow{copper, 573 \ K} C$

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Aniline on nitration yields ortho,meta and para nitro derivatives of aniline.
Reason $R$: Nitrating mixture is a strong acidic mixture.
In the light of the above statements,choose the correct answer from the options given below.

Arrange the following in the increasing order of their basic strengths: $CH_{3}NH_{2}$,$(CH_{3})_{2}NH$,$(CH_{3})_{3}N$,$NH_{3}$.