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Question

Which of the following animals are capable of hearing ultrasound?

A
Dog
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B
Giraffe
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C
Dolphin
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D
Elephant
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Solution

The correct options are
A Dog
C Dolphin
Ultrasound refers to sound having frequency above 20 kHz. Animals like dogs, bats, shrews, dolphins are capable of hearing ultrasound. Whereas elephants and giraffe are capable of hearing infrasound, which is below 20 Hz.

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