Match Column I with Column II
Column I      Column II
A. Soda ash      I. CaSO$$_4$$
B. Chlorophyll      II. CaOH$$_2$$
C. Used in Whitewashing      III. Na$$_2$$CO$$_3$$
D. Dentistry, ornamental work      IV. Mg$$^{2+}$$ ions

A

A - III, B - IV, C - I, D - II

B

A - II, B - I, C - III, D - IV

C

A - III, B - I, C - II, D - IV

D

A - II, B - III, C - IV, D - I