This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: IUGR and Feeding of Preterm Neonate, Subject name: Pediatrics
Which of the following is true about 'Small for gestational age' baby? 
Select and explain. 
A. Bih weight is < 10th percentile of expected according to gestational age, B. Bih weight is < 2000 g, C. Length of the baby is < 50th percentile of expected, D. Length,weight and head circumference of the baby are < 50th percentile of expected
A: Bih weight is < 10th percentile of expected according to gestational age
Answer: A: Bih weight is < 10th percentile of expected according to gestational age 
Explanation: A neonate whose weight falls between the 10th and 90th percentile is considered as appropriate for gestational age (AGA); if the weight falls below 10th percentile, the neonate is classified as small for gestational age (SGA); the neonate is classified as large for gestational age (LGA), if the weight falls at 90th percentile or above for gestational age. The SGA babies have grown suboptimally during intrauterine period (intrauterine growth restriction, IUGR). These babies have thin slender look, loose folds of wrinkled skin, and monkey like fades.