heart disease is the term used for abnormalities of the heart that are present at birth. Options:
Coronary
Congenital

congenital

Explanation:

congenital heart disease: heart disorder in newborns

coronary is an artery disease

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.

answer(b) keep oxygenated and deoxygenated blood separate;