Match the following:

Elements	Ore
$1$. Lithium	$a$. Beryl
$2$. Sodium	$b$. Spodumene
$3$. Beryllium	$c$. Gypsum
$4$. Calcium	$d$. Carnallite

(C) The correct matches are:
$1$. Lithium is found in the ore Spodumene $(LiAlSi_2O_6)$.
$2$. Sodium is found in the ore Carnallite $(KCl \cdot MgCl_2 \cdot 6H_2O)$.
$3$. Beryllium is found in the ore Beryl $(Be_3Al_2Si_6O_{18})$.
$4$. Calcium is found in the ore Gypsum $(CaSO_4 \cdot 2H_2O)$.
Therefore, the correct sequence is $1-b, 2-d, 3-a, 4-c$.