The patient is admitted with shortness of breath and chest discomfort.Which of the following laboratory values could account for the patient's symptoms?

A) Hemoglobin level of 80 g/L.
B) Hematocrit level of 45%.
C) Red blood cell count of 5.0 million/mm3.
D) Pulse oximetry value of 90%.

Chest Discomfort

A symptom that can manifest as pain, pressure, or tightness in the chest area, potentially indicative of cardiovascular problems or other health issues.

Hemoglobin Level

The concentration of hemoglobin in the blood, a critical factor in determining the blood’s capacity to carry oxygen to the body's tissues.

Pulse Oximetry

Pulse oximetry is a non-invasive method used to measure the oxygen saturation level of the blood.