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Q.

Match the items given in column I with those in column II and select the correct option.

 Column I Column II
(a)Operculum(i)Osteichthyes
(b)Air sacs(ii)Mammalia
(c)Claspers(iii)Aves
(d)Diaphragm(iv)Chondrichthyes
 abcd
1iviiiiii
2iiiiivii
3iiiiviii
4iiiiiiiv

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a

1

b

2

c

3

d

4

answer is B.

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Detailed Solution

Operculum-Osteichthyes (four pairs of gills covered by an operculum on each side)
Air sacs-Long bones are hollow with air cavities in Aves
Claspers-Are present on pelvic fins in male cartilaginous fishes (Chondrichthyes)
Diaphragm-Separates the thorax and the abdomen in Mammalia. Helps in breathing.
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