question_answer

Fill in the blanks with the correct combination of words.

In our heart, the top side of \[\underline{\,\,\,\,P\,\,\,\,}\] is connected to \[\underline{\,\,\,\,Q\,\,\,\,}\]which brings oxygenated blood into it from the lungs and the top side of \[\underline{\,\,\,\,R\,\,\,\,}\]is connected to \[\underline{\,\,\,\,S\,\,\,\,}\]which brings deoxygenated blood in to it from all the body organs except lungs.

A) P-Right atrium, Q-pulmonary vein, R-atrium, S-vena cava

B) P-left atrium, Q-pulmonary vein, R-right atrium, S-vena cava

C) P-vena cava, Q-pulmonary vein, R-right atrium, S-left atrium

D) P-left atrium, Q-vena cava, R-right atrium, S-pulmonary vein

E)  None of these