Question:

Which of the following has the fastest heartbeat?

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Smaller animals like rats have higher heart rates compared to larger mammals.
Updated On: Oct 27, 2025
  • Elephant
  • Human
  • Rat
  • Whale
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The Correct Option is C

Solution and Explanation

Smaller animals generally have a higher metabolic rate and a faster heartbeat. Rats have a heart rate of around 300-400 beats per minute. Thus, the correct answer is \( \mathbf{(C) \text{Rat}} \).
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