Final answer:
The correct answer is B) 30-60 breaths per minute; irregular; periods of apnea less than 20 seconds, which is the typical respiratory rate for a newborn. (option b)
Step-by-step explanation:
The typical respiratory rate of a newborn is option B) 30-60 breaths per minute; irregular; periods of apnea less than 20 seconds. It's normal for newborns to have an irregular breathing pattern that includes periodic pauses in breathing. As children grow older, their respiratory rate decreases.
By the time they are around 10 years old, it drops to about 18 to 30 breaths per minute, and in adolescence, it is similar to adults, ranging from 12 to 18 breaths per minute.
Hence, the answer is option b