A. Data obtained from previously published sources
B. Data collected through secondary sources like journals and reports
C. Data that has been analyzed and interpreted by another researcher
D. Data collected by an investigator for the first time for a specific purpose
Answer: Option D
Solution (By JKExamLibrary)
Primary data is original data collected firsthand by the investigator specifically for the current research purpose, distinguishing it from secondary data which is pre-existing.
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