Which laryngeal cartilage is shaped like a signet ring and forms a large portion of the posterior laryngeal wall?

A confused 89-year-old patient is complaining of dyspnea and chest pain. The patient became ill four days ago with a productive cough and yellow green sputum it has crackles in the right middle and lower lobes. Skin turgor is poor and his lips and tongue are dry and cracked. VS: BP 98/60; p 118, RR 32, spo2 88%, T 103F. Which of these should a paramedic suspect?

A) Left ventricular failure B) Pneumonia C) Chronic bronchitis D) Pulmonary edema

Retreating without taking the patient with you when a scene turns dangerous is:

A) Unacceptable and abandonment B) Acceptable and not abandonment C) Unethical but also not abandonment D) Possibly abandonment but acceptable