Which of the following is an example of a heritable condition?

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A heritable condition is one that is genetically passed from parents to offspring, typically through mutations in specific genes that can increase susceptibility to certain diseases or conditions. Cancer resulting from inherited genetic mutations exemplifies this concept because certain types of cancer, such as breast or colorectal cancer, can occur due to inherited mutations like BRCA1 or BRCA2. These genetic mutations predispose individuals to develop these forms of cancer, demonstrating a clear link to heredity.

In contrast, the other options presented are primarily associated with environmental factors or lifestyle choices rather than genetic inheritance. Diseases caused solely by environmental factors stem from external influences without any genetic basis. Infections transmitted through contaminated water are infectious diseases, not heritable, since they do not involve genetic transmission. Lastly, vitamin deficiencies arise due to dietary inadequacy, which is also not related to heredity. Thus, option B stands out as the only choice that correctly identifies a condition that can be inherited through genetic predisposition.