I need a note on medical use of drugs and misuse1

answer:

Definition of Drug Misuse. The term misuse in this document refers to the illegal or illicit drug taking or alcohol consumption which leads a person to experience social, psychological, physical or legal problems related to intoxication or regular excessive consumption and/or dependence. Now drug abuse is the use of illegal drugs or the use of prescription or over-the-counter drugs for purposes other than those for which they are meant to be used, or in large amounts. Drug abuse may lead to social, physical, emotional, and job-related problems.

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i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.