The appropriate cuff width for measuring arterial blood pressure in a child with a mid-arm circumference of 15 cm is:

Correct Answer: C

Rationale: The correct blood pressure cuff width should be about 40% of the arm circumference. For a mid-arm circumference of 15 cm, a 6 cm cuff width is appropriate.

Correct Answer: C

Rationale: Hemophilia A is a clotting disorder due to Factor VIII deficiency, leading to prolonged activated partial thromboplastin time (APTT) while PT, BT, and TT remain normal.

Correct Answer: B

Rationale: Vasculitis is specifically defined as inflammation of the blood vessels, which can affect circulation and organ function.

Correct Answer: A

Rationale: Children with head trauma, intellectual disabilities, or epilepsy are at higher risk for psychiatric disorders due to neurological vulnerabilities. Smart students do not inherently face increased psychiatric risks.

Correct Answer: D

Rationale: The rationale is that tuberculin skin tests (TST) may give false-negative results immediately after arrival due to factors like recent travel stress or malnutrition. Therefore, repeating the test after 3-6 months ensures more accurate results. The other tests are generally required to be repeated for ongoing monitoring.