One of the following is a characteristic feature of Mycoplasma pneumonia in the pediatric age group:

Correct Answer: C

Rationale: Mycoplasma pneumonia often presents with mild symptoms that do not correlate well with physical findings. It is known for a protracted course, low-grade fever, and a persistent cough. Antibiotics like macrolides are used for treatment, as penicillins are ineffective.

Correct Answer: B

Rationale: Tetralogy of Fallot is the most common cyanotic congenital heart disease, characterized by right ventricular outflow obstruction, VSD, overriding aorta, and right ventricular hypertrophy. It leads to cyanosis and may cause complications like brain abscess due to right-to-left shunting.

Correct Answer: C

Rationale: Salicylate poisoning leads to metabolic acidosis with a high anion gap due to the accumulation of organic acids, including lactate and ketoacids. It initially causes respiratory alkalosis, followed by metabolic acidosis.

Correct Answer: A

Rationale: An oropharyngeal airway should not be inserted in a conscious patient, as it can trigger gagging and further airway obstruction.

Correct Answer: D

Rationale: Irritability is an early sign of hypoxia in infants, as oxygen deprivation initially affects neurological function before progressing to more severe signs like cyanosis.