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
TRUE regarding chi square test is - 
Select and explain. 
A. Null hypothesis is equal, B. Dosen't test the significance, C. Measures the significance of difference between two proportion, D. Tests correlation and regression
C: Measures the significance of difference between two proportion
Answer: C: Measures the significance of difference between two proportion 
Explanation: None