This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
A 'non-parametric test' used to compare three or more independent groups of sampled data? 
Select and explain. 
A. Chi-square test, B. Fishers test, C. Kruskal-Wallis test, D. McNemar test
C: Kruskal-Wallis test
Answer: C: Kruskal-Wallis test 
Explanation: Kruskal-Wallis Test is a non-parametric test (distribution-free) used to compare three or more independent groups of sampled data.