<prompt> Sternal puncture is done at which siteJunction of upper and lower half of bodyUpper pa of manubriumLower pa of manubriumJust above xiphisternum  <response>: Answer-B. Upper pa of manubriumSternal punctureManubrium sterni is the preferred site for bone marrow aspiration because it is subcutaneous and readily accessible.The bone marrow sample is required for haematological examination. A thick needle is inseed into the upper pa of the manibrium to avoid injury to arch of aoa, which lies behind the lower pa. 