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B
Flying fox (Bat)
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C
Elephant
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D
Whale
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Solution
The correct option is A
Platypus
Mammals are generally viviparous. However, there are a few exceptions such as the platypus (endemic to Australia), which is oviparous, but suckles the young ones. This is why they are grouped under the class Mammalia. Bat, elephant and whale are viviparous mammals.