Body Fluids And Its Circulation

Match the valves of human heart in column I with the respective opening they guard in column II and select the correct option.

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Column - I		Column - II
i.	Eustachian valve	a.	Opening of pulmonary aorta
ii.	Thebesian valve	b.	Left atrioventricular aperture
iii	Mitral valve	c.	opening of inferior vena cava
iv.	Semilunar valve	d.	opening of coronary sinus