This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neonatal hypothermia, Subject name: Pediatrics
What is this device used to prevent hypothermia in a preterm neonate? 
Select and explain. 
A. Radiant warmer, B. Incubator, C. Room Heater, D. Phototherapy unit
B: Incubator
Answer: B: Incubator 
Explanation: The given picture shows an incubator:has inbuilt feedback system that controls temperature inside incubator. Radiant warmer: open system. Baby lies on crib