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Match the following columns and select the correct option.
Column I Column II
(a) 6-15 pairs of gill slits (i) Trygon
(b) Heterocercal caudal fin (ii) Cyclostomes
(c) Air Bladder (iii) Chondricthyes
(d) Poison sting (iv) Osteicthyes
a b c d
1 iii iv i ii
2 iv ii iii i
3 i iv iii ii
4 ii iii iv i

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answer is D.

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Detailed Solution

6-15 pairs of gill slits	-	Cyclostomes
Heterocercal caudal fin	-	Chondrichthyes
Air bladder	-	Osteichthyes
Poison sting	-	Trygon

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