What is formed when benzylamine reacts with nitrous acid?

Identify the product of the following reaction:
$Ph-CH=CH-CN$ $\xrightarrow[2. H_3O^+]{1. CH_3MgBr}$ $\xrightarrow{NaBH_4, \Delta} \text{Product}$

Give the major product of the following reaction $.$

Assertion $(A)$: $-NH_2$ group of aniline is ortho,para directing in electrophilic substitutions.
Reason $(R)$: $-NH_2$ group stabilises the arenium ion formed by the ortho,para attack of the electrophile.
The correct answer is

In the following reaction,the major product $(P)$ formed is

Products that are formed in the given reaction including by-products are: $CH_3CH_2CH_2CH_2CONH_2 + Br_2 + 4 NaOH \rightarrow$