Correct Answer: A

Rationale: Large push-pull toys are suitable for a 12-month-old as they encourage gross motor skills and physical activity, which are crucial for their development at this age.

Correct Answer: A

Rationale: The correct answer is A: 'Avoid using any latex product.' In the case of a suspected latex allergy, it is crucial to prevent exposure to latex products to avoid allergic reactions. Choice B is incorrect because there are no truly non-allergenic latex products. Choice C is irrelevant to the situation described in the question, as the child does not have asthma. Choice D is also incorrect because desensitization is not an immediate option for managing a suspected latex allergy.

Correct Answer: A

Rationale: Playing peek-a-boo is an ideal play activity for a 7-month-old as it encourages visual tracking and social interaction, which are key developmental milestones at this age.

Correct Answer: B

Rationale: At 2 months, infants typically react to loud noises with the Moro reflex, a startle response that is normal at this stage of development.

Correct Answer: A

Rationale: The Advisory Committee on Immunization Practices (ACIP) of the Centers for Disease Control and Prevention (CDC) and American College of Obstetricians and Gynecologists recommend that pregnant adolescents and women without protection against pertussis should receive the Tdap vaccine ideally between 27 and 36 weeks of gestation or postpartum before discharge from the hospital. This timeframe allows for the development of antibodies in the mother to protect her and provide passive immunity to the infant. Administering the vaccine during the first trimester (Choice D) is not recommended as the optimal time is between 27 and 36 weeks. Choice B, during the first prenatal visit, is too early for optimal protection, and Choice C, 24 hours prior to delivery, does not provide enough time for the vaccine to be effective before birth.