Which of the following is NOT one of the four main vital signs?

• A. Temperature
• B. Pulse
• C. Respiration
• D. Weight

Answer: (D)

The four main vital signs are essential indicators of a person's physiological status and include temperature, pulse, respiration, and blood pressure. Weight is not classified as a vital sign because it does not directly reflect the body's immediate physiological functioning like the others do. While weight can provide useful information regarding a patient's overall health and can be indicative of various health conditions, it is typically assessed separately and is not routinely monitored as a vital sign during clinical assessments. Thus, weight does not fit into the same category as the vital signs that are consistently used to quickly evaluate a patient's critical health status.