Correct Answer: A

Rationale: The correct answer is 'Cereal.' The guidelines of the American Academy of Pediatrics recommend introducing one new food at a time, starting with strained cereal. Cereal is often recommended as a first solid food for infants due to its soft texture and iron-fortified properties, which are important for the baby's development. Eggs and meat are common allergenic foods and are usually introduced later. Juice is not recommended for infants under 1 year old due to its high sugar content and lack of nutritional value compared to whole fruits.

Correct Answer: B

Rationale: Massage the fundus. The nurse's first action should be to massage the fundus until it is firm as uterine atony is the primary cause of bleeding in the first hour after delivery. Checking vital signs, offering a bedpan, or checking for perineal lacerations are important assessments but addressing the boggy uterus and vaginal bleeding due to uterine atony takes precedence in this situation.

Correct Answer: D

Rationale: Intussusception is a condition where a part of the bowel slides into the next section, causing an obstruction. The classic presentation includes severe abdominal pain that is crampy, intermittent, and may cause the child to draw knees to the chest. While vomiting can occur, it is not typically projectile in nature. A key hallmark of intussusception is the passage of bright red blood and mucus in the stools, often described as currant jelly-like. Watery diarrhea and ribbon-like stools are not typical signs of intussusception and should not be expected in a child with this condition.

Correct Answer: D

Rationale: Acute glomerulonephritis (AGN) is generally considered an immune-complex disease in response to a previous B-hemolytic streptococcal infection, typically occurring 4 to 6 weeks prior. It is not an infectious disease but a noninfectious renal condition. Therefore, the parent's belief that the child 'caught' the disease is inaccurate. Choice A is incorrect because AGN is not a direct streptococcal infection involving the kidney tubules but an immune response to a prior streptococcal infection. Choice B is incorrect as AGN is not easily transmissible in schools and camps. Choice C is incorrect as AGN is not usually associated with chronic respiratory infections but with a previous streptococcal infection.

Correct Answer: B

Rationale: The higher pitched a sound is, the more narrow the airway. Therefore, the obstruction has increased or worsened. With no evidence of secretions, there is no support to indicate the need for suctioning. Wheezes changing from low-pitched to high-pitched and extending throughout exhalation suggest a progression in airway constriction, indicating an increase in airway obstruction. Option B is incorrect because the change in wheezes from low to high pitch does not suggest an improvement in airway obstruction. Option C is incorrect as there is no indication of secretions requiring suctioning. Option D is incorrect as hyperventilation is not typically associated with the described change in wheezes.