Which of these antituberculosis agents can cause optic neuritis?

Correct Answer: D

Rationale: Ethambutol inhibits arabinosyl transferase and can cause dose-dependent optic neuritis with red-green color blindness.

Correct Answer: D

Rationale: Rumination disorder does not always resolve spontaneously; it often requires intervention such as behavioral therapy. Additionally, while neglect may contribute, it is not the sole cause.

Correct Answer: B

Rationale: Depression is commonly associated with chronic fatigue syndrome, as both conditions share overlapping symptoms such as fatigue and low mood.

Correct Answer: D

Rationale: Mixed cellularity Hodgkin lymphoma is the most common subtype in children and is associated with Epstein-Barr virus. It presents with widespread lymphadenopathy and systemic symptoms. Nodular sclerosis is more common in adolescents and young adults.

Correct Answer: A

Rationale: Pleural friction rub is typically heard throughout both inspiration and expiration. It is caused by inflamed pleural surfaces rubbing together and may disappear when fluid accumulates.