Question

Match column I with column II and select the correct answer from the given codes.

Column I		Column II
$A$	The stage in which physical treatment of sewage is done	(i)	Anaerobic digestion activated sludge and production of biogas
$B$	The stage in which biological treatment of sewage is done	(ii)	Activated sludge
$C$	Name of the sediment in primary treatment	(iii)	Aeration tanks
$D$	It is carried to aeration tanks from primary settling	(iv)	Primary effluent
$E$	Name of the sediment in secondary treatment	(v)	Primary sludge
$F$	Site of floes growth	(vi)	Secondary treatment
$G$	Function of sludge digester	(vii)	Primary treatment

• A. $A-(vii)$, $B-(vi)$, $C-(v)$, $D-(iv)$, $E-(ii)$, $F-(iii)$, $G-(i)$
• B. $A-(i)$, $B-(iii)$, $C-(v)$, $D-(vii)$, $E-(ii)$, $F-(iv)$, $G-(vi)$
• C. $A-(i)$, $B-(ii)$, $C-(iii)$, $D-(iv)$, $E-(v)$, $F-(vi)$, $G-(vii)$
• D. $A-(vii)$, $B-(vi)$, $C-(i)$, $D-(ii)$, $E-(iii)$, $F-(iv)$, $G-(v)$

Answer 1

Answer: (A)

Correct answer is (a) $A-(vii)$, $B-(vi)$, $C-(v)$, $D-(iv)$, $E-(ii)$, $F-(iii)$, $G-(i)$