This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
In asymmetrical IUGR which organ is not affected – 
Select and explain. 
A. Subcutaneous fat, B. Muscle, C. Liver, D. Brain
D: Brain
Answer: D: Brain 
Explanation: IUGR is classified as
1) Symmetric IUGR

Reduced growth is an asymmetric → head circumference, length and weight equally affected.
Has earlier onset.
Is associated with diseases that seriously affect fetal cell number, such as conditions with chromosomal, genetic malformation, teratogenic, infectious or severe maternal hypertensive etiologies.

2) Asymmetric IUGR

Reduced growth is asymmetric with relative sparing of head growth.
Has late onset.
Is associated with poor maternal nutrition or with late onset/exacerbation of maternal vascular disease (preeclampsia, chronic hypertension).