Correct Option: B. Intrusion Explanation of the Correct Answer The question asks which of the following is not a common way by which people abuse drugs. To answer this, we need to understand the common methods of drug administration and how they relate to drug abuse.

1. Ingestion (Option A): This is a common method of drug use where substances are taken orally. This includes pills, capsules, or liquids. Many drugs, including prescription medications and recreational drugs, are commonly abused through ingestion. For example, people might misuse painkillers or consume alcohol in excessive amounts.
2. Inhalation (Option C): This method involves breathing in substances, which can include smoking drugs like marijuana or inhaling vapors from substances like glue or paint. Inhalation allows drugs to enter the bloodstream quickly through the lungs, making it a popular method for those looking to experience rapid effects.
3. Injection (Option D): This method involves using a syringe to inject drugs directly into the bloodstream or muscle. It is a common method for abusing drugs like heroin or certain prescription medications. Injection can lead to very rapid effects and is associated with a high risk of addiction and health complications.
4. Intrusion (Option B): This term is not commonly used in the context of drug administration. It does not refer to a recognized method of drug use or abuse. Instead, it might imply an act of entering or interfering, which does not fit the context of drug administration methods. Therefore, it is the correct answer as it does not represent a common way people abuse drugs.

Why the Other Options Are Incorrect

• Option A (Ingestion): This is a well-known and widely practiced method of drug abuse. It is incorrect to say that ingestion is not a common way to abuse drugs.
• Option C (Inhalation): Inhalation is also a prevalent method of drug abuse, especially for substances that are smoked or vaporized. Thus, it cannot be the correct answer.
• Option D (Injection): Injection is a significant method of drug abuse, particularly for certain illicit drugs. It is a common practice among users seeking immediate effects. Therefore, this option is also incorrect.

Summary of Key Points

• Ingestion, inhalation, and injection are all recognized methods of drug abuse.
• Intrusion is not a standard term used in the context of drug administration, making it the correct answer.
• Understanding the methods of drug use is crucial for recognizing patterns of abuse and potential health risks.
• Always be aware of the terminology used in discussions about drug use to avoid confusion.

This thorough understanding of the methods of drug abuse will help you in your studies and in recognizing the implications of drug use in society.