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: Physiology
In contraction stress test, positive interpretation is: 
Select and explain. 
A. Early deceleration, B. Early acceleration, C. Persistent late deceleration, D. Variable deceleration
C: Persistent late deceleration
Answer: C: Persistent late deceleration 
Explanation: C i.e. Persistent late decelerationIt is an invasive method to assess fetal well being during pregnancy, when there is alteration in FHR in response to uterine contraction. It suggests fetal hypoxia.