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Select the correct statement about drugs and medicines.

1. Drugs are chemicals of low molecular mass.
2. Drugs produce biological response.
3. Drugs which are used in diagnosis, prevention and treatment of diseases are called medicines.
4. Chemotherapy is the use of chemical for therapeutic effect.

Correct answer: Chemotherapy is the use of chemical for therapeutic effect.

Solution

Each statement is a correct textbook definition; in particular chemotherapy is the use of chemicals for a therapeutic effect on the body.

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