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Which one of the following groups of thr...

Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature?

A

Columba, Equus, and Balaenoptera-Dorsal hollow nerve cord and poikilothermous

B

Ptreopus, Pavo, Macropus and Psittacula-4 chambered heart and homeothermy

C

Ascaris, Wuchereria and Pheretima-Pseudocoelomates and metamerism

D

Dentalium, octopus, apis, and bombyx-open circulatory system and dorsal nerve cord

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The correct Answer is:
B
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