$A$ heart rate that is below the normal range is called:

Hypochromic or macrocytic anaemia is due to

Select the correct option regarding the disorders of the circulatory system.

Wenckebach phenomenon is seen in

Given below are two statements regarding silent heart attack.
Statement $I$: This type of heart attack shows symptoms like chest pain and shortness of breath.
Statement $II$: In this type of heart attack,usually the person shows very mild symptoms and thus it is ignored.
In the light of the above two statements,choose the correct answer from the options given below.

Read the statements $A$ and $B$ and select the correct option.
$Statement A$: Atherosclerosis is a disease characterized by the thickening of arterial walls.
$Statement B$: Deposition of cholesterol and triglycerides in the arterial walls causes atherosclerosis.