Cardiac output is determined by which of the following?

Given below are four statements $(i-iv)$ regarding the human blood circulatory system.
$(i)$ Arteries are thick-walled and have a narrow lumen as compared to veins.
$(ii)$ Angina is acute chest pain when the blood circulation to the heart muscle is reduced.
$(iii)$ Persons with blood group $AB$ can donate blood to any person with any blood group under the $ABO$ system.
$(iv)$ Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?

Select the correct option regarding the clotting of body fluids in a test tube.

In connection with the circulatory system,where are valves present?

Match column $I$ with column $II$:

Column $I$	Column $II$
$(a)$ Eosinophils	$(i)$ Coagulation
$(b)$ $RBC$	$(ii)$ Universal Recipient
$(c)$ $AB$ Group	$(iii)$ Resist Infections
$(d)$ Platelets	$(iv)$ Contraction of Heart
$(e)$ Systole	$(v)$ Gas transport

Donnan effect is shown by