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B
Tiger
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C
Lion
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D
Blue whale
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Solution
The correct option is D Blue whale Mammals are vertebrates and warm blooded animals. They are viviparous i.e give birth to young ones. They have hair and fur on their body. They have mammary glands. For example, humans, dogs, cats, dolphins, whales, etc.
Blue whale is a marine mammal, weighing about 173 tonnes and 29.9 meters in length. It is the largest animal known to have ever existed.