The vein which brings deoxygenated blood from the posterior part of the body is the

1. pulmonary vein
2. superior vena cava
3. inferior vena cava
4. none of these

The main artery that emerges from the left ventricle of the heart is the

1. pulmonary artery
2. superior vena cava
3. inferior vena cava
4. aorta

Blood group A has

1. antigen A and antibody B
2. antigen B and antibody B
3. antigen A and antibody A
4. antigen B and antibody A

Which of these is a fluid that contains infection-fighting white blood cells?

1. platelet
2. lymph
3. plasma
4. none of these