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
A research was undeaken by a group of psychiatrists and obstetricians to assess postpaum depression in mothers giving bih to male versus female children according to the Edinburgh depression scale (EPDS). What test should be used to compare the outcomes? 
Select and explain. 
A. Student's t-test, B. Paired t-test, C. Chi-square test, D. Pearson's correlation coefficient
C: Chi-square test
Answer: C: Chi-square test 
Explanation: Answer- C. Chi-square test Chi-square test- Comparison of two independent qualitative variablesA 'non-parametric test' of significanceUsed to 'test significance of association between 2 or more qualitative characteristicsUsed to compare propoions in 2 or more groupsUsed for non-Normal (non-Gaussian) distributions