Match Column I with Column II

	Column I		Column II
A	Soda ash	I	${\mathrm{CaSO}}_4$
B	Chlorophyll	II	$\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$
C	Used in Whitewashing	III	${\mathrm{Na}}_2{\mathrm{CO}}_3$
D	Dentistry, ornamental work	IV	${\mathrm{Mg}}^{2+}$ ions

 

• Correct answer
  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

Hence, the correct answer is option: 'A'.