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B
Placentals
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C
Both of the above
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D
Prothotherians
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Solution
The correct option is A Marsupials
Marsupials are an infraclass of mammals found only in Australia region due to geographical isolation.
A distinctive characteristic, common to most species, is that the young are carried in a pouch.
They have a bifurcated penis, separated into two columns so that the penis has two ends corresponding to the females' two vaginas. Hence, option A is the correct answer.