Correct Answer: D

Rationale: The correct answer is DTaP. DTaP is administered at 2, 4, and 6 months of age; between 15 and 18 months of age; and between 4 and 6 years of age. Since the child has only received three doses of this vaccine, the next dose of DTaP should be administered. The other options are incorrect because Hib is administered at 2, 4, and 6 months of age and between 12 and 15 months; IPV is administered at 2, 4, and 6 months of age and between 4 and 6 years of age; MMR is administered between 12 and 15 months of age and again between 4 and 6 years of age.

Correct Answer: C

Rationale: Breastfed infants pass very soft, seedy, mustard-yellow stools, which is considered normal. Formula-fed infants excrete stools that are more solid and pale yellow to light brown. It is essential for the mother to understand that seedy, mustard-yellow stools are expected in breastfed infants, indicating that there is no need for concern. Monitoring for infection as the first response without other symptoms can cause unnecessary anxiety. Decreasing the number of feedings without valid reasons can lead to inadequate nutrition for the newborn. Therefore, the correct advice for the nurse to provide in this scenario is that seedy, mustard-yellow stools are normal for breastfed infants, reassuring the mother and promoting proper understanding of newborn stool characteristics.

Correct Answer: B

Rationale: If a woman pushes strenuously before the cervix is completely dilated, she risks injury to the cervix and the fetal head. Blowing prevents closure of the glottis and breath-holding, helping overcome the urge to push strenuously. The woman would be encouraged to blow repeatedly, using short puffs, when the urge to push is strong. This breathing technique allows for controlled exhalation and helps prevent unnecessary pushing. Cleansing breaths (deep inspiration and expiration at the beginning and end of each contraction) are encouraged during the first stage of labor to provide oxygenation and reduce myometrial hypoxia and to promote relaxation. Holding her breath and using the Valsalva maneuver (choice A) is not recommended as it can increase intra-abdominal pressure and decrease venous return, potentially compromising fetal oxygenation. Deep inspiration and expiration at the beginning and end of each contraction (choice D) are more suitable for relaxation and oxygenation purposes rather than managing the urge to push.

Correct Answer: A

Rationale: A chemical reaction between drugs before their administration or absorption is termed a drug incompatibility. This phenomenon commonly occurs when drug solutions are mixed before intravenous administration but can also happen with orally administered drugs. Choices B, C, and D are incorrect because side effects, adverse events, and allergic responses typically occur after the drugs have been administered and absorbed, not before.

Correct Answer: D

Rationale: To assess tactile (vocal) fremitus, the nurse palpates the thorax and compares vibrations from side to side as the client repeats the word 'ninety-nine.' This technique helps in evaluating the intensity and symmetry of vibrations felt. Palpating for symmetric chest expansion involves assessing the expansion of the chest during breathing by placing hands on the anterolateral wall. Auscultating the breath sounds over the trachea and larynx is done to assess bronchial breath sounds, while auscultating over the peripheral lung fields is used to assess vesicular breath sounds.