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
Design Effect' is associated with which of the following sampling techniques - 
Select and explain. 
A. Stratified sampling, B. Systemic sampling, C. Cluster sampling, D. Simple Random Sampling
C: Cluster sampling
Answer: C: Cluster sampling 
Explanation: None