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Choose the odd one out:

( a ) Petromyzon
( b ) Carcharodon
( c ) Trygon
( d ) Scoliodon
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1 Answer

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(A) is the right answer.

Class – Cyclostomata : Examples: Petromyzon (Lamprey). Class – Chondrichthyes : Examples: Scoliodon (Dog fish), Carcharodon (Great white shark), Trygon (Sting ray).
answered Jan 3, 2014 by pady_1
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