Congestion of the lungs is one of the main symptoms in
a)	Hypotension	b)	Coronary artery disease
c)	Angina	d)	Heart failure

(d)

Heart failure means the state of heart when it is not pumping blood effectively enough to meet the needs of body. It is sometimes called congestive heart failure because congestion of the lungs is one of the main symptoms of this. Heart failure is not the same as cardiac arrest or a heart attack. In cardiac arrest, heart stops beating while in a heart attack, the heart muscle is suddenly damaged by an inadequate blood supply.