**Core Concept**
In pediatric patients, the normal range of intracranial pressure (ICP) is crucial for assessing various neurological conditions. The ICP is the pressure within the cranial cavity, which surrounds the brain and cerebrospinal fluid (CSF). Normal ICP values are essential for identifying potential issues such as hydrocephalus, intracranial hemorrhage, or other conditions that may affect the brain.

**Why the Correct Answer is Right**
The correct answer, **10-15 mm of Hg**, represents the normal range of ICP in children. This value is significantly lower than in adults, where the normal range is typically reported to be around 5-15 mm of Hg. The lower ICP in children is attributed to the larger size of their skulls in relation to their brain mass, which allows for more space and flexibility. Additionally, the pediatric brain is more pliable and has a higher water content, contributing to the lower ICP.

**Why Each Wrong Option is Incorrect**
**Option A:** < 5mm of Hg is an unrealistic value for ICP, as it is lower than the normal range reported for both children and adults.

**Option B:** 50-80 mm of Hg is excessively high and may indicate severe intracranial hypertension or other life-threatening conditions.

**Option D:** 20-30 mm of Hg is higher than the normal range and may be seen in conditions such as hydrocephalus or increased ICP.

**Clinical Pearl / High-Yield Fact**
In pediatric patients, it's essential to consider the age and developmental stage when assessing ICP. For example, in premature infants, ICP values can be higher due to the smaller skull size and increased brain water content.

**✓ Correct Answer: C. 10-15 mm of Hg**