Social & Preventive Medicine Which of the following is/are non-random sampling methods-a) Quota samplingb) Stratified random samplingc) Convenience Samplingd) Cluster Sampling A a B bc C ad D ac 💡 Explanation Which of the following is/are non-random sampling methods-a) Quota samplingb) Stratified random samplingc) Convenience Samplingd) Cluster Sampling ✓ Correct Answer: D. ac