The state of the heart when it is not pumping blood effectively enough to meet the needs of the body is known as:

$A$ chemical that prevents blood clotting is most useful in the treatment of

Blood cancer is the excess production of leucocytes. It is known as:

Give scientific reasons:
$(1)$ Plaque stimulates/causes the formation of a blood clot on the wall of an artery.
$(2)$ Blood pressure and smoking have a direct relation with obesity.

Heaviness with severe chest pain which may disappear with rest indicates:

Match Column-$I$ with Column-$II$.

Column-$I$	Column-$II$
a. Hypertension	$1$. Chest pain
b. Atherosclerosis	$2$. Capacity of blood flow reduced from heart to body
c. Angina	$3$. Affect to the organs like brain and kidney
d. Heart failure	$4$. Cholesterol deposition in arteries