This section contains questions each with two columns I and II. 

Match the items in column I with that in the column II.

COLUMN - I		COLUMN - II
(a)	Corundum	i.	${\mathrm{Ca}}_2{\mathrm{B}}_6{\mathrm{O}}_{11}\cdot 5{\mathrm{H}}_2\mathrm{O}$
(b)	Cryolite	ii.	${\mathrm{Al}}_2{\mathrm{O}}_3\cdot 2{\mathrm{H}}_2\mathrm{O}$
(c)	Potash alum	iii.	Na3Al F6
(d)	Colemanite	iv.	Al2O3
(e)	Bauxite	v.	${\mathrm{Na}}_2{\mathrm{B}}_4{\mathrm{O}}_7\cdot 10{\mathrm{H}}_2\mathrm{O}$
(f)	Borax	vi.	${\mathrm{K}}_2{\mathrm{SO}}_4\cdot {\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3\cdot 24{\mathrm{H}}_2\mathrm{O}$

• A

  a$\to$iv; b$\to$iii; c$\to$vi; d$\to$i; e$\to$ii; f$\to$v

• B

  a$\to$i; b$\to$ii; c$\to$iii; d$\to$iv; e$\to$v; f$\to$vi

• C

  a$\to$vi; b$\to$v; c$\to$iv; d$\to$iii; e$\to$ii; f$\to$i

• D

  a$\to$iv; b$\to$iii; c$\to$i; d$\to$ii; e$\to$vi; f$\to$v