Correct Answer: D

Rationale: As shock progresses and decompensation occurs, confusion and somnolence are indicative of reduced cerebral perfusion. Early signs include thirst and irritability, while confusion and altered consciousness appear as the condition worsens.

Correct Answer: B

Rationale: Acetaminophen poisoning primarily affects the liver, leading to hepatic involvement, which may present as jaundice, liver failure, or elevated liver enzymes. Hyperpyrexia, severe pain, and drooling are more associated with other types of poisoning.

Correct Answer: C

Rationale: Ensuring the dose does not exceed 15 mg/kg is critical to avoid overdose and potential liver damage. Retaking the temperature immediately or using cold compresses is not necessary, and placing a warm blanket could exacerbate the fever.

Correct Answer: C

Rationale: Giardia lamblia is a protozoan parasite known to cause acute diarrhea, often through contaminated water or food. Shigella, Salmonella, and E. coli are bacterial pathogens that also cause diarrhea but are not parasites.

Correct Answer: A

Rationale: Sudden and severe scrotal pain in an adolescent male is a medical emergency and may indicate testicular torsion, which requires immediate evaluation and intervention to prevent testicular loss.