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Question

Infrasound can be heard by

A
dog
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B
bat
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C
rhinoceros
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D
human beings
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Solution

The correct option is D rhinoceros
Rhinos have extremely good ears, picking up infra-sound far deeper than the range of human hearing.
Rhinos, can hear down to a frequency of four hertz, whereas even a human baby, with entirely undamaged ears, can normally only pick up sounds as low as 20 hertz. Giraffes and elephants can also hear in this infra-sound range.

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