This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New born infants, Subject name: Pediatrics
Normal value of Fetal scalp pH is ? 
Select and explain. 
A. 6.9, B. 7, C. 7.1, D. 7.3
D: 7.3
Answer: D: 7.3 
Explanation: * Fetal scalp blood testing is a technique during labor to confirm whether the oxygenation is sufficient.* Two constituents are tested by this method they are pH and lactate , both being indicators of acid base homeostasis.Normal values should be pH >7.25. * acidemia is <7.21 Reference: GHAI Essential pediatrics, 8th edition