<prompt> Surface marking of the mitral valve isBehind sternal end of left 4th costal cailageBehind sternal end of right 4th costal cailageLeft 4th intercostal space in the midclavicular lineLeft 3rd intercostal space in the midclavicular line  <response>: Surface marking of mitral value is an oblique line 3 cm behind the left half of sternum opposite left 4th coastal cailage. 