Answer:
D. Heart disease
Step-by-step explanation:
The heart disease refers to the disorder in the heart which leads to abnormal function of the heart tissue. The heart disease can be caused by the various factors and is one of the major cause of death of humans.
In the given question since the cause and symptoms of the three different persons are different, that is reduced supply of the oxygen to the heart, blockage of the artery and death of the cardiac cells but they affect the same organ, therefore, heart disease is the best option.
Thus, Option-D is the correct answer.