Correct Answer: B

Rationale: Metatarsus adductus is a condition characterized by the inward turning of the front part of the foot. It is often caused by the baby's position in the womb, leading to the foot adopting this position. Choice A is incorrect because metatarsus adductus is primarily related to positioning in utero rather than a genetic defect. Choice C is incorrect as there is an understanding of the common cause of this condition. Choice D is incorrect because metatarsus adductus specifically refers to a foot deformity, not a hip deformity.

Correct Answer: B

Rationale: The correct answer is to offer a pacifier to the infant before administering tube feeding. Offering a pacifier helps stimulate the sucking reflex, preparing the infant for feeding and promoting digestion and comfort. Irrigating the tube with water (Choice A) is not typically the first action before tube feeding and may not be necessary. Slowly instilling formula (Choice C) should only be done after the infant is prepared for feeding. Placing the infant in the Trendelenburg position (Choice D) is not necessary and may not be recommended for tube feeding.

Correct Answer: B

Rationale: The correct answer is B: Steroids. Children receiving steroids should not receive the varicella vaccine as it can increase the risk of severe infection due to the immunosuppressive effects of steroids. Insulin (Choice A), antibiotics (Choice C), and anticonvulsants (Choice D) do not interact with the varicella vaccine in the same way as steroids, and therefore, they are not contraindicated.

Correct Answer: D

Rationale: The correct answer is D: "These responses are replaced by voluntary activity at about five months of age." The grasp reflex and startle reflex (Moro reflex) are normal in newborns but typically disappear as the infant's nervous system matures and voluntary control develops. Choice A is incorrect because checking the responses before deciding a course of action does not address the developmental milestone related to the reflexes. Choice B is incorrect as it jumps to a conclusion of developmental delay without considering the normal developmental process. Choice C is incorrect as additional sensory stimulation is not necessary for the return of these reflexes, as they are expected to naturally diminish as part of normal development.

Correct Answer: B

Rationale: The correct answer is B: 'Avoid gluten.' Celiac disease is a condition in which the immune system reacts to gluten, a protein found in wheat, barley, and rye. Avoiding gluten is essential in managing celiac disease as it helps prevent damage to the small intestine and alleviate symptoms. Choices A, C, and D are incorrect because dairy products, high-fat foods, and foods high in sugar do not directly relate to the management of celiac disease. It is crucial to focus on eliminating gluten-containing foods to effectively control the condition.