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Q.

Infra sound can be heard by

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a

dog

b

bat

c

rhinoceros

d

human beings

answer is C.

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Detailed Solution

Very small sounds (below 20 Hz) can be heared by rhinoceros. Dog can here above 20 Hz range. Bat can hear ultra sounds. Human beings can hear range of sound 20 Hz to 20,000 Hz.
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