All the following are complications of serum sickness EXCEPT

Correct Answer: A

Rationale: Colitis is not a known complication of serum sickness, while systemic immune reactions can lead to carditis, nephritis, and neuropathies.

Correct Answer: D

Rationale: Older children with school refusal more commonly experience anxiety disorders rather than obsessive disorders. Somatic symptoms are indeed prevalent in school refusal cases.

Correct Answer: C

Rationale: Measles has an incubation period of approximately 10-14 days before symptoms like fever, cough, and Koplik spots appear.

Correct Answer: A

Rationale: Not all children present with the classic triad of cough, wheezing, and decreased breath sounds. Some cases may be asymptomatic or present atypically, necessitating bronchoscopy for confirmation.

Correct Answer: A

Rationale: Repeated exposure to ophthalmic medications can lead to contact allergy, characterized by redness, swelling, and itching.