Arrange the following events in a proper sequence.

i) Increased ventricular pressure

ii) Attempted backflow of blood into the atria

iii) Ventricular systole

iv) Closure of AV valves

1. i)-ii)-iii)-iv)

2. ii)-i)-iii)-iv)

3. iii)-i)-ii)-iv)

4. i)-iii)-ii)-iv)

(1) initiating and maintaining a random contractile ability of heart

(2) initiating and maintaining a rhythmic contractile ability of heart

(3) maintaining a random contractile ability of heart

(4) Initiating a rhythmic contractile ability of heart

(1) left ventricle and aorta

(2) right ventricle and pulmonary artery

(3) left ventricle and pulmonary vein

(4) both 1 and 2

(1) left atria and aorta

(2) right atria and pulmonary artery

(3) left atria and left ventricle

(4) right atria and right ventricle

(1) left atria and aorta

(2) right atria and right ventricle

(3) left atria and left ventricle

(4) both 1 and 2

(1) Megakaryoblast

(2) Megakaryocyte

(3) Macrokaryoblast

(4) Macrophages

(1) 20 %, antigen, platelets, plasma

(2) 80 %, antigen, RBC, blood

(3) 80 %, antibody, platelet, plasma

(4) 20 %, antibody, RBC, blood

(1) presence of two soluble antibodies

(2) absence of two surface antigens

(3) presence of two surface antigens

(4) both 2 and 3

(1) RBC

(2) WBC

(3) Platelets

(4) Fibrinogen

(1) 12-20 g/10 mL of blood

(2) 12-14 g/ 100 mL of blood

(3) 12-20 g/ 10 mL of blood

(4) 12-14 g/ 1ss mL of blood