Correct Answer: D

Rationale: At 6 months, infants typically begin to combine syllables like "dada" or "mama," but they do not yet understand the meaning of these words.

Correct Answer: B

Rationale: The correct answer is B. Acquired aplastic anemia in children is often caused by exposure to certain drugs, such as chloramphenicol or antiepileptics, which can lead to bone marrow failure and a decrease in all types of blood cells. Choices A, C, and D are incorrect because aplastic anemia is not commonly caused by deficient diet, congenital defects, or injury in children.

Correct Answer: C

Rationale: The prodromal period is the interval between the early manifestations of the disease and the time when the overt clinical syndrome is evident. Most communicable diseases are contagious during this time. Identifying the prodromal stage is crucial for early intervention and preventing the spread of the disease. While the source and causative agent are important aspects of disease control, recognizing the early signs in the prodromal stage allows the nurse to take timely actions. Constitutional symptoms occur during the active disease phase, indicating that the child has already been contagious, and early intervention opportunities may have passed.

Correct Answer: B

Rationale: Administering antibiotics on schedule is crucial in treating a UTI effectively and preventing complications. Antibiotics help to eliminate the infection-causing bacteria from the urinary tract. While maintaining adequate nutrition and hydration are important aspects of care, the priority in a UTI is to target the infection with antibiotics. Preventing enuresis (bedwetting) is not directly related to the treatment of the infection. Fluid restriction is not recommended in the management of a UTI; in fact, encouraging adequate fluid intake helps flush out bacteria from the urinary tract.

Correct Answer: B

Rationale: In this case, the infant's symptoms are consistent with narcotic withdrawal. Infants exposed to drugs in utero may display withdrawal symptoms starting around 12 to 24 hours post-birth. The presentation often includes hyperactive reflexes, tremors, sneezing, high-pitched shrill cry, poor feeding, and sucking avidly on hands. Signs such as loose stools, tachycardia, fever, projectile vomiting, sneezing, and generalized sweating are common. These symptoms are not indicative of a seizure disorder. Placental insufficiency typically leads to a small-for-gestational-age child, which is not mentioned in the scenario. Meconium aspiration syndrome primarily presents with respiratory distress, not the symptoms described in this case.