Final answer:
The correct differential diagnoses for a linear hypopigmented lesion are Vitiligo and Linear morphea. Lichen planus is not typically associated with hypopigmentation.
Step-by-step explanation:
The differential diagnosis (ddx) for a linear hypopigmented lesion includes several conditions, such as Vitiligo, which is characterized by depigmentation leading to lighter colored patches of skin. However, other conditions can also present with hypopigmentation, such as Linear morphea, a localized form of scleroderma that can cause linear, sclerotic skin changes. Lichen planus is typically not hypopigmented, rather it often presents with purplish, itchy, flat bumps on the skin. Therefore, the correct answer in this list for a hypopigmented lesion would be Vitiligo (B) and Linear morphea (C), but not Lichen planus (A). It is important to note that each of these conditions presents with distinct clinical features, hence a thorough examination and possible biopsy may be necessary for accurate diagnosis.