This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Skin, Subject name: Skin
Which layer of epidermis is underdeveloped in the VLBW infants in the initial 7 days? 
Select and explain. 
A. Stratum germinativum., B. Stratum granulosum, C. Stratum lucidum, D. Stratum corneum
D: Stratum corneum
Answer: D: Stratum corneum 
Explanation: Ans. is 'd' ie., stratum corneum "Stratum corneum is permeable in preterm infants and becomes similar to the adults and in infants after two to three weeks of post natal maturation" - page 109, Physical diagnosis in neonatology: