What purpose do arterial venous lines serve, and in which vessels are they placed?

a) Arterial venous lines are used for blood transfusions and are placed in the carotid artery.
b) Arterial venous lines assist in measuring blood pressure and are placed in the jugular vein.
c) Arterial venous lines facilitate drawing blood samples and are placed in the femoral artery.
d) Arterial venous lines assist in measuring blood pressure and are placed in the jugular vein.