Life span of Human heart is________________?
Correct answer: A. 2 Billion
- A. 2 Billion
- B. 4 Billion
- C. 5Billion
- D. 7 Billion
Explanation
The human heart is commonly estimated to beat about 2 billion times during a lifetime, although estimates vary with lifespan and resting heart rate. The options are referring to lifetime heartbeats, not the heart’s age or physical lifespan.
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