653Every Day ScienceMedium
Approximately, how many times each day do our heart valves open and close normally?
A1,00,000
B10,000
C2,00,000
D1,50,000
Correct answer
A. 1,00,000
Explanation
1,00,000 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.