Column I (Species)		Column II (Colour in aq – solution)
a	$C{o}^{3+},C{o}^{2+}$	p	Yellow
b	$F{e}^{2+}$	q	Blue pink
c	$C{u}^{2+}$	r	Green
d	$M{n}^{3+}$	s	Violet
e	$F{e}^{3+}$	t	Blue

$a – p, b – r, c – q, d – s, e – t$

$a – q, b – s, c – p, d – r, e – t$

$a – q, b – r, c – t, d – s, e – p$

$a – t, b – r, c – q, d – s, e – p$