Correct Answer: B

Rationale: Climbing is a gross motor milestone typically achieved between 2 to 3 years of age. It involves coordination and strength. Jumping in place is usually mastered around 2 years of age. Standing on one foot with help is a skill that emerges around 3 years. Riding a tricycle typically occurs closer to 3 years and involves coordination and balance, which are more refined skills compared to climbing at an earlier age.

Correct Answer: C

Rationale: For infants, the pinna is pulled down and back to straighten the ear canal and allow proper visualization of the tympanic membrane during otoscopic examination.

Correct Answer: C

Rationale: The correct answer is C. Falling when bending over to touch toes could indicate a developmental delay or a balance issue that may need further assessment. Choices A, B, and D are typical developmental milestones for a 3-year-old child. Pedaling a tricycle without assistance, unscrewing a bolt on a toy, and building a tower of 10 cubes are all age-appropriate activities for a child of this age.

Correct Answer: C

Rationale: Providing a simple explanation satisfies the child's curiosity and helps reduce any anxiety about the procedure.

Correct Answer: D

Rationale: Allowing the child to place their hand over the nurse's hand helps reduce the tickling sensation and increases the child's comfort during the examination.