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 about reliability of a test 
Select and explain. 
A. Consistency and reproducibility of the test are not a problem, B. Investigator’s knowledge is important, C. Gives same results on repeated tests, D. Extent of variation of measurement of contained behaviour
C: Gives same results on repeated tests
Answer: C: Gives same results on repeated tests 
Explanation: RELIABILITY OF A TEST
• Gives same results on repeated tests: Reliability
• Investigator’s knowledge is important
• Consistency and reproducibility of the test are not a problem
• Extent of variation of measurement of contained behaviour