Which artery carries deoxygenated blood,unlike all other arteries?

All vertebrates possess a ...$A$.... Fishes have a ...$B$... chambered heart with atrium and ventricles. Amphibians and reptiles have a ...$C$... chambered heart. Birds and mammals have ...$D$... chambered heart.
Choose the correct option.

The opening of the post caval vein into the right atrium is guarded by which of the following?

Describe the structure of myocardial tissue.

In a rabbit,oxygenated blood flows from:

During human fetal development, the pulmonary artery is connected to the aorta by a narrow duct called the ductus arteriosus. What is this structure called after it closes and becomes a fibrous remnant in an adult?