The correct answer is (b) 72.
A normal healthy human heart beats 72 times per minute. This is the average number of beats per minute for adults at rest. The number of beats per minute can vary depending on a number of factors, such as age, activity level, and health status.
For example, a newborn baby’s heart beats about 120 times per minute, while an adult’s heart beats about 72 times per minute. During exercise, the heart rate can increase to 150 beats per minute or more.
If your heart rate is consistently higher or lower than the normal range, it could be a sign of a health problem. If you are concerned about your heart rate, talk to your doctor.
Here is a brief explanation of each option:
(a) 52: This is a lower than normal heart rate. A lower than normal heart rate is called bradycardia. Bradycardia can be caused by a number of things, such as a slow metabolism, certain medications, or a heart condition.
(b) 72: This is the average number of beats per minute for adults at rest.
(c) 85: This is a higher than normal heart rate. A higher than normal heart rate is called tachycardia. Tachycardia can be caused by a number of things, such as exercise, stress, or a heart condition.
(d) 90: This is also a higher than normal heart rate.