Which mammal lacks corpus callosum?

Ornithorhynchus

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Macropus

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Both A and B

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None of the above

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Solution

The correct option is C Both A and B
The corpus callosum is the connecting thick band that joins the two hemispheres and found only in placental mammals the eutherians, while it is absent in monotremes and marsupials like Ornithorhyncus and Macropus. Thus, the correct answer is option C.

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