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: Gynaecology & Obstetrics
Blood will interfere with the nitrazine test for de tecting ruptured membranes because: 
Select and explain. 
A. It is acid, B. It is alkaline, C. It contains increased amounts of sodium chloride, D. It contains decreased amounts of sodium chloride
B: It is alkaline
Answer: B: It is alkaline 
Explanation: It is alkaline