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: Dental
Which layer of the epidermis is underdeveloped in the VLBW infants in the initial 7 days – 
Select and explain. 
A. Stratum genninativum, B. Stratum granulosum, C. Stratum lucidum, D. Stratum corneum
D: Stratum corneum
Answer: D: Stratum corneum 
Explanation: First layer to develop is stratum basale and the last one is the stratum corneum.
In preterm infants stratum corneum is underdeveloped and permeable (normal stratum corneum is impermeable) and becomes similar to adult and full-term infant after 2-3 weeks, postnatal maturation.