Match the items in List-$A$ with the items in List-$B$.

List-$A$	List-$B$
$(1)$ $He$	$(A)$ High electron gain enthalpy
$(2)$ $Cl$	$(B)$ Electropositive element
$(3)$ $Ca$	$(C)$ Strong reducing agent
$(4)$ $Li$	$(D)$ High ionization enthalpy

(A) $(1-D), (2-A), (3-B), (4-C)$
$1$. $He$ (Helium) is a noble gas with a stable electronic configuration,resulting in a very high ionization enthalpy $(D)$.
$2$. $Cl$ (Chlorine) is a halogen with a high tendency to gain an electron,resulting in a high electron gain enthalpy $(A)$.
$3$. $Ca$ (Calcium) is an alkaline earth metal,which is electropositive in nature $(B)$.
$4$. $Li$ (Lithium) is an alkali metal and acts as a strong reducing agent $(C)$.