Correct Answer: A

Rationale: After rehydration, a regular diet is generally recommended to ensure proper nutrition and recovery. A regular diet includes a balanced intake of all food groups and nutrients. Fruit juices may be too high in simple sugars and lack necessary nutrients, which can exacerbate diarrhea. While a high carbohydrate diet may be beneficial in some cases, a regular diet is more comprehensive. The BRAT diet, consisting of bananas, rice, apples, and toast or tea, was previously recommended for diarrhea, but it lacks adequate protein and fat, so a regular diet is now preferred for overall better nutrition and recovery.

Correct Answer: C

Rationale: Common complications of activated charcoal administration include diarrhea and vomiting. Intestinal obstruction can occur if the charcoal forms a mass in the intestines. Fluid retention is less likely and not typically a complication associated with activated charcoal.

Correct Answer: D

Rationale: High fever, especially in very young infants, or the presence of a stiff neck can indicate a serious infection requiring immediate attention. A fever lasting more than 3 days also warrants medical evaluation.

Correct Answer: A

Rationale: Severe diarrhea can lead to a loss of bicarbonate, resulting in metabolic acidosis. This is a common complication of prolonged or severe diarrhea, especially in children.

Correct Answer: B

Rationale: Weighing diapers is the most accurate way to estimate urine output in a child who is not toilet trained. This method provides a measurable and reliable estimate of fluid output.