Good 'cough etiquette' means covering your nose and mouth when coughing or sneezing; disposing of tissue immediately, and washing hands thoroughly:

Correct Answer: A

Rationale: Proper cough etiquette reduces the spread of respiratory infections.

Correct Answer: A

Rationale: PF stands for preservative-free, indicating the medication lacks preservatives.

Correct Answer: A

Rationale: Sunlight is not a physical agent of sterilization as it is not consistently used in controlled sterilization processes; dyes are chemical agents.

Correct Answer: B

Rationale: The duodenum has four parts: superior, descending, horizontal, and ascending.

Correct Answer: D

Rationale: Q needle is not a standard surgical needle shape.