**Core Concept**
The presence of acantholytic cells in a blister cavity is a characteristic histopathological feature of pemphigus, a group of autoimmune skin disorders. Acantholytic cells are keratinocytes that have undergone loss of intercellular connections due to autoantibody-mediated disruption of desmoglein proteins.

**Why the Correct Answer is Right**
In pemphigus, autoantibodies target desmoglein 1 and 3 proteins, which are essential for maintaining the integrity of keratinocyte intercellular connections. The binding of these autoantibodies to desmoglein proteins activates the complement cascade, leading to the formation of acantholytic cells. These cells are characterized by their rounded appearance and the presence of a cleared halo around the nucleus, due to the loss of desmosomal attachments. The presence of acantholytic cells in the blister cavity is a hallmark of pemphigus and is used as a diagnostic feature in histopathological examinations.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because acantholytic cells are not typically associated with bullous pemphigoid, a different autoimmune skin disorder that primarily targets the basement membrane zone.

**Option B:** This option is incorrect because acantholytic cells are not characteristic of staphylococcal scalded skin syndrome (SSSS), which is caused by exfoliative toxins produced by Staphylococcus aureus.

**Option C:** This option is incorrect because acantholytic cells are not typically associated with epidermolysis bullosa, a group of genetic disorders that primarily affect the basement membrane zone.

**Clinical Pearl / High-Yield Fact**
Pemphigus can be differentiated from other blistering disorders by the presence of acantholytic cells in the blister cavity and the characteristic "cerebriform" appearance of the basal layer.

**Correct Answer:** A.