Biology · Human Physiology
एक सामान्य वयस्क मनुष्य में एक हृदय चक्र की अवधि कितनी होती है?
- 11.2 सेकंड
- 21.0 सेकंड
- 30.8 सेकंड✓
- 40.5 सेकंड
सही उत्तर देखें
0.8 सेकंड
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