In the given reaction cycle

X, Y and Z respectively are

A

X $$-$$ CaCO$$_3$$, Y $$-$$ NaCl, Z $$-$$ KCl

B

X $$-$$ CaCO$$_3$$, Y $$-$$ NaCl, Z $$-$$ HCl

C

X $$-$$ CaO, Y $$-$$ NaCl + CO$$_2$$, Z $$-$$ NaCl

D

X $$-$$ CaO, Y $$-$$ NaCl + CO$$_2$$, Z $$-$$ KCl