Which of the following is NOT a type of asphyxia?

• A. Drowning
• B. Choking
• C. Mechanical
• D. Chemical

Answer: (B)

Asphyxia is a situation where the body's oxygen supply is blocked or unusable. In this framework, the main types are drowning, mechanical asphyxia, and chemical asphyxia. Drowning causes lack of oxygen through immersion and inability to breathe air; mechanical asphyxia involves external forces or obstructions that prevent air from entering the lungs; chemical asphyxia involves poisons or gases that interfere with oxygen use. Choking describes an airway obstruction that leads to the same outcome, but it is not treated as a separate category of asphyxia in this classification — it’s the mechanism that would fall under mechanical asphyxia. Therefore, choking is not a distinct type of asphyxia, making it the correct choice.