<prompt> All of the following aeries are common sites of occlusion by a thrombus except:Anterior intervetricularPosterior interventricularCirucumflexMarginal  <response>: D i.e. Marginal Nodal, Acute Marginal Posterior Descending interventricular aeryQ are branches of Right Coronary aery; whereas Circumflex, Diagonal, Obtuse Marginal Anterior Descending interventricular aeryQ are branches of Left Coronary Aery. LAD, RCA and LCX are common whereas as marginal branches are uncommon site of thrombosis. 