Correct Answer: D

Rationale: A compromised immune system is a contraindication for the MMRV vaccine because it is a live attenuated vaccine and could potentially cause an infection in an immunocompromised child.

Correct Answer: D

Rationale: Neuroblastoma is a cancer that commonly originates in the adrenal glands located in the abdomen. It can also occur in nerve tissues along the spine, but it is most frequently found in the abdominal region. Therefore, the correct answer is D. Choices A, B, and C are incorrect as Neuroblastoma typically arises from neural crest cells in the adrenal glands or sympathetic ganglia, not in the bones, kidneys, or cortex.

Correct Answer: A

Rationale: Encouraging the mother to express her feelings allows her to process the situation and prepares her for receiving further information in a supportive environment.

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.