Double circulation occurs in

The figure shows blood circulation in humans with labels $A$ to $D$. Select the option which gives correct identification of label and functions of the part.

Match Column-$I$ with Column-$II$ and select the correct option.

Column-$I$	Column-$II$
$A$. Fish	$(I)$. $3$-chambered heart
$B$. Amphibians	$(II)$. Incomplete double circulation
$C$. Aves	$(III)$. $4$-chambered heart
	$(IV)$. Single circulation
	$(V)$. $2$-chambered heart
	$(VI)$. Double circulation

The circulatory pattern,in which blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses,is called $.......$ and it is found in $........$

The course of blood flow in pulmonary circulation is . . . . . . . . . . . . .

Identify whether the given statements are true or false for double circulation.
$I$. It prevents the mixing of oxygenated and deoxygenated blood in the heart.
$II$. It circulates only oxygenated blood through the heart.
Choose the correct option accordingly.