<prompt> All are true about pigmented stones except:Seen in cholangiohepatitisSecondary CBD stonesPrimary CBD stonesMore common in Asians  <response>: Ans. b Secondary CBD stonesRef: Sabiston 19e p 1485-1486 Black pigmented stones are seen in hemolytic states. Brown pigmented stones can form in the bile duct itself Primary Bile duct stone MC stone in Asian People Hepato lithiasis - the commonest stone is Earthy Brown Stones 