There are more than 3 categories of drugs. If you could re-ask the question with a little more background it may be helpful.
There are 3 catagories of drugs these are:
Illegal
Legal
Both
The three main categories of fashion are haute couture,ready-to-wear and mass market.
Diesel, gas and stream?
The three main categories of lipids are triacylglycerols, diacylglycerides, and steroids.
Running, Jumping, and Throwing.
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The three main categories of elements on the periodic table are metals, metalloids, and nonmetals.
i don't know tell me pls about that !
The three main categories of nouns are:common or propersingular or pluralabstract or concreteSome other categories of nouns are:count or non-count (mass nouns)possessivecollectivecompoundgerundsmaterialattributive
The three main categories of distracted driving are visual distractions (taking your eyes off the road), manual distractions (taking your hands off the wheel), and cognitive distractions (taking your mind off driving).
Which of the following drug categories may be selected por DUE criteria ?
upgrade, exchange components and add devices
Retail banking, Investments and Loans