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
Bias can be eliminated by all except? 
Select and explain. 
A. Matching, B. Blinding, C. Randomization, D. Multivariate analysis
D: Multivariate analysis
Answer: D: Multivariate analysis 
Explanation: Ans. is 'd' i.e., Multivariate analysis Matching eliminates confounding bias Blinding eliminates subject, investigator and analyzer bias, depending on the type of blinding. Randomization elminates selection (Investigator) bias and confounding bias.