Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolves in aqueous HCl. What is the identify of A ?
A. 2-phenylethanamine
B. 1-phenylethanamine
C. 1-cyclohexylethanamine
D. N-ethylaniline