Thrombosis in which coronary artery is met most frequently in?

Heartbeat can be initiated by

The pre-caval veins collect blood from

$SA$ node (Sinoatrial node) ke baare mein sahi kathan chuniye:
$I$. Located at the right upper corner of the right atrium.
$II$. Heart of heart.
$III$. It initiates the rhythmic contractile activity of the heart.
$IV$. It is called the pace-keeper of the heart.
$V$. It is called the pacemaker of the heart.
Which of the following options contains the correct statements?

Average cardiac output is

Who is known as the 'Father of Physiology'?