Given below depicts the sequence of blood circulation in frog. Identify A,B,C respectively

Ventricle $\to \underline{ \mathrm{A} } \to$arteries $\to$body parts $\to$veins $\to$venacava $\to \underline{ \mathrm{B} } \to \underline{ \mathrm{C} }$

conus arteriosus, sinus venosus, left atrium

sinus venosus, conus arteriosus, right atrium

conus arteriosus, sinus venosus, right atrium

sinus venosus, conus arteriosus, left atrium