**Question:** Extremely LBW child is defined as-

A. A child with birth weight less than 10th percentile for gestational age
B. A child with birth weight less than 1,500 grams
C. A child with birth weight less than 1,000 grams
D. A child with birth weight less than 1,200 grams

**Correct Answer:** D. A child with birth weight less than 1,200 grams

**Core Concept:** Low Birth Weight (LBW) is defined as a neonate's birth weight falling below a certain threshold. This threshold varies depending on gestational age.

**Why the Correct Answer is Right:** Extremely Low Birth Weight (ELBW) is a subset of LBW where the birth weight falls below a specific value. In this case, the correct answer (D) refers to a birth weight of less than 1,200 grams, which is considered extremely low due to the significant impact on the child's health and development.

**Why Each Wrong Option is Incorrect:**

A. The 10th percentile is not a universally accepted threshold for ELBW and may vary depending on the population studied.
B. Although a birth weight of 1,500 grams is a commonly used cutoff for LBW, it is not considered as the correct threshold for ELBW.
C. A birth weight of 1,000 grams is too high for an ELBW classification.

**Why ELBW Matters:** Extremely low birth weight infants are at increased risk of severe complications, including:

1. Premature birth complications like respiratory distress syndrome, hypotension, and hypothermia.
2. Neurodevelopmental and cognitive impairments, including cerebral palsy and learning disabilities.
3. Increased risk of infections and sepsis due to immature immune system.
4. Higher risk of chronic lung disease, retinopathy of prematurity, and necrotizing enterocolitis.
5. Increased risk of feeding problems, gastrointestinal complications, and developmental delays.

**Clinical Pearl:** Monitoring and managing ELBW infants require a multidisciplinary approach, including neonatologists, pediatricians, and neonatal nurses, as these infants have complex health needs due to their vulnerable status.