Column-$(I)$ contains the formula of an alkyl halide and Column-$(II)$ contains its type. Match Column-$(I)$ with Column-$(II)$.

Column-$(I)$	Column-$(II)$
$(A)$ $CH_3CH_2X$	$(1)$ $4^{\circ}$ halide
$(B)$ $R'CH_2X$	$(2)$ $3^{\circ}$ halide
$(C)$ $R'R''CHX$	$(3)$ $2^{\circ}$ halide
$(D)$ $R'R''CR'''X$	$(4)$ $1^{\circ}$ halide

(D) The classification of alkyl halides is based on the number of alkyl groups attached to the carbon atom bearing the halogen atom:
- $(A)$ $CH_3CH_2X$ is a primary $(1^{\circ})$ halide.
- $(B)$ $R'CH_2X$ is a primary $(1^{\circ})$ halide.
- $(C)$ $R'R''CHX$ is a secondary $(2^{\circ})$ halide.
- $(D)$ $R'R''CR'''X$ is a tertiary $(3^{\circ})$ halide.
Therefore,the correct matching is: $(A-4, B-4, C-3, D-2)$.