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: Social & Preventive Medicine
1 degree of freedom in chi – square test, the value of x2 for a probability of 0.05 is 
Select and explain. 
A. 0.45, B. 2.41, C. 4.34, D. 3.84
D: 3.84
Answer: D: 3.84 
Explanation: None