'C' wave in JVP is due to-
Atrial contraction
Tricuspid valve bulging into right atrium
Right atrial filling
Rapid ventricular filling
Answer is B (Tricuspid valve bulging into right atrium) The 'C' Wave is a positive wave produced by the bulging of tricuspid valve into the right atrium during right Ventricular isovolumetric systole and by impact of the carotid aery adjacent to the jugular vein.