Identify I and II given in the reaction from the following option.

I	II
(1)
(2)
(3)
(4)

$-N{H}_2$ group of aromatic amine can be protected by acetylation with acetic anhydride and then followed by hydrolysis of the substituted amide to form the substituted amine. Complete reaction is as follows : 

Hence, I is acetanilide and 4 – bromacetanilide