Question

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The above question is based on Scholastic aptitude where a survey was done to identify the effectiveness of a group of medicines by the help of a randomly chosen people suffering with high cholesterol. Need help, Kinda confused! :D

Please include the correct answer, explain why you chose that approach and deleted the others. Have a good answering time✌️
#BeBrainly~​

Answer 1

Answer:

survey is in every place because of good environment in delhi there it is a lot of polution they are things to include survey