Which of the following is a common feature of relapsing polychondritis?

Correct Answer: D

Rationale: Relapsing polychondritis causes cartilage inflammation, joint pain, and hearing loss, making 'All of the above' the correct answer.

Correct Answer: C

Rationale: Obstructive sleep apnea syndrome is suggested by snoring, daytime sleepiness, and enlarged tonsils, whereas tonsillitis or abscess would present with additional signs of infection.

Correct Answer: C

Rationale: The steeple sign is a characteristic radiologic feature of croup (acute laryngotracheobronchitis).

Correct Answer: D

Rationale: Poliomyelitis causes asymmetric, flaccid motor paralysis without sensory loss, as it primarily affects anterior horn cells.

Correct Answer: B

Rationale: Oxygen saturation (SpOâ‚‚) refers to the percentage of hemoglobin molecules bound to oxygen. A saturation of 90% indicates that 90% of hemoglobin is oxygenated, which corresponds to a PaOâ‚‚ of around 60 mmHg, suggesting mild hypoxemia.