**Core Concept**
Herpes gestationis, also known as pemphigoid gestationis, is a rare autoimmune skin disease characterized by the formation of blistering skin lesions in pregnant women. It is a classic example of a blistering disease with a clear immunopathological basis.

**Why the Correct Answer is Right**
The direct immunofluorescence findings in Herpes gestationis reveal deposits of IgG and C3 at the basement membrane zone (BMZ) of the epidermis. This is due to the autoantibodies targeting proteins BP180 (also known as collagen XVII) and BP230, which are essential components of the hemidesmosomes. The immune complexes formed by these autoantibodies and their antigens lead to complement activation and subsequent inflammation, resulting in blister formation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe the characteristic direct immunofluorescence findings in Herpes gestationis. While IgG and C3 deposits can be seen in various autoimmune diseases, the specific pattern and location of these deposits are unique to Herpes gestationis.
**Option B:** This option is incorrect as it does not accurately describe the characteristic direct immunofluorescence findings in Herpes gestationis. The deposits seen in Herpes gestationis are primarily located at the BMZ, not in the dermal papillae.

**Clinical Pearl / High-Yield Fact**
Herpes gestationis is a classic example of an autoimmune disease that can be triggered by pregnancy, highlighting the complex interplay between the immune system and the hormonal changes that occur during pregnancy.

**Correct Answer:** C. Deposition of IgG and C3 at the basement membrane zone (BMZ) of the epidermis.