**Core Concept:** The newborn heart rate is an important clinical parameter that indicates cardiovascular maturity and overall health of the baby. It is influenced by various factors like gestational age, fetal circulation, and postnatal adaptation.

**Why the Correct Answer is Right:** The correct answer, **C. 100-160 beats per minute (bpm)**, represents the normal range for a healthy newborn. This range is derived from the transition period of the fetus from an intrauterine life with a stable circulation to an extrauterine life with the need for rapid adaptation. The higher end of the range (160 bpm) is typically observed in premature infants, where the heart rate may increase due to immature autonomic regulation. On the other hand, a significantly lower heart rate (e.g., 60 bpm) could indicate hypoxia, hypoglycemia, or other complications.

**Why Each Wrong Option is Incorrect:** Option A (60-100 bpm) is too narrow and may not encompass the full range of normal values. Option B (100-200 bpm) is too broad and may include infants with respiratory distress syndrome or other complications. Option D (>180 bpm) is too high and raises concerns about respiratory distress, sepsis, or other critical conditions.

**Clinical Pearl:** Monitoring the newborn's heart rate is crucial in the first few minutes and hours after birth to identify any concerning trends or abnormalities. Rapid heart rate decline or elevation should prompt further assessment for potential underlying issues.

**Correct Answer:** .