Correct Answer: A

Rationale: The correct answer is A: A white reflex. The 'white reflex' or leukocoria is a common sign of retinoblastoma. It occurs when the light reflects off the tumor in the eye, giving the pupil a white appearance instead of the normal red reflex. Blue-tinged sclerae (choice B) and yellow-tinged sclerae (choice D) are not typical manifestations of retinoblastoma. A red reflex (choice C) is the normal reflection seen in the eye when light is shone on it and is not associated with retinoblastoma.

Correct Answer: B

Rationale: The correct answer is B: Hemophilia is an X-linked recessive disorder, primarily affecting males and passed from mothers to sons. It involves a deficiency in clotting factors, leading to prolonged bleeding. Choice A is incorrect as hemophilia is not autosomal dominant. Choice C is incorrect as hemophilia does not involve platelets. Choice D is incorrect as hemophilia is not autosomal recessive.

Correct Answer: B

Rationale: Pain management should be based on the child's report of pain, regardless of their activity level. Administering the prescribed analgesic is the appropriate action. Reassessing the child in 15 minutes without providing immediate pain relief may not be in the child's best interest. Doing nothing since the child appears to be resting may lead to inadequate pain management. Asking the child's parents if they think the child is hurting does not replace the need for direct assessment and intervention by the nurse.

Correct Answer: D

Rationale: The correct answer is D because sitting steadily typically occurs closer to 6-8 months of age, not 3 or 4 months. Choice A is incorrect because sitting ability and the age of first tooth eruption are not related. Choice B and C are incorrect as most infants do not sit steadily at 3 or 4 months, and it is more common for infants to achieve this milestone around 6-8 months.

Correct Answer: D

Rationale: After ensuring the child's immediate survival needs are met with CPR, contacting poison control is critical to receive specific guidance on how to proceed with treatment. Other actions may be necessary depending on the situation but should follow contacting poison control.