Hypochromic or macrocytic anaemia is due to

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.

Chest pain due to inadequate oxygen supply to the heart muscle is called:

Which coronary artery disease is caused due to the narrowing of the lumen of arteries?

The murmuring sound in the heart takes place due to

Blood cancer is known as ..........