Assertion (A) : In order to convert `R-Cl` to pure `R-NH_(2)` Gabriel Phthalimide synthesis can be used.
Reason (R) : Phthalimide synthesis can be used to prepare pure `1^(@)` or `2^(@)` or `3^(@)` amines separately with proper choice of alkyl halide.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not a correct explanation of A.
C. A is true but R is false.
D. A is false but R is false.
