To determine the normal (average) pulse for infants, we need to consider the average range of heartbeats per minute that is typical for this age group based on medical knowledge.
Let's evaluate the options provided:
A. 100 to 160: This range encompasses a higher number of heartbeats per minute, which is typical for infants who generally have faster pulses.
B. 75 to 100: This range is comparatively lower and is more typical for older children or adults.
C. 80 to 110: Again, a lower range that is not typical for the rapid heart rate observed in infants.
D. 60 to 90: This is a very low range, which would be more typical for older children or adults rather than infants.
Given that infants usually have a significantly faster heart rate compared to older age groups, the range provided in option A (100 to 160) is the normal and expected average pulse for infants.
Therefore, the correct answer is
A. 100 to 160.
