Final answer:
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a type of cardiomyopathy where myocardial tissue is replaced with fibrous and fatty tissue, leading to arrhythmias. The option (B) is correct.
Step-by-step explanation:
The type of cardiomyopathy that results from the replacement of myocardial tissue with fibrous and fatty tissue is known as arrhythmogenic right ventricular cardiomyopathy (ARVC). ARVC is a disease of the heart muscle whereby the myocardium, particularly of the right ventricle, is progressively replaced by fibrous scar and fat tissue. This condition leads to cardiac arrhythmias which can be life-threatening.
The unique characteristic of ARVC is that it involves a pathological change in the myocardial structure which is distinct from other forms of cardiomyopathy, such as hypertrophic cardiomyopathy where the heart muscle thickens, or dilated cardiomyopathy where the heart chambers enlarge. Therefore, option (B) is correct.