Cracked pot sound or Macewen sign is characteristic sign of –

Correct option is A

Sol. Macewen’s sign is a resonant "cracked pot" sound heard in hydrocephalus due to separated sutures. Explanation of each option: ● (a) Hydrocephalus – Correct answer. Caused by excess CSF leading to skull suture separation. ● (b) Spina bifida – A neural tube defect, not associated with cranial percussion signs. ● (c) Meningitis – Involves inflammation of meninges; doesn't produce Macewen sign. ● (d) Pyloric stenosis – Gastrointestinal disorder unrelated to cranial examination.