Choice A rationale:

 Itchy, scaly patches of skin are not commonly associated with Acne Vulgaris.

Instead, these symptoms may be indicative of other skin conditions such as eczema or psoriasis.

Choice B rationale:

 The formation of comedones (blackheads and whiteheads) is a hallmark symptom of Acne Vulgaris.

These comedones result from the clogging of hair follicles with a combination of sebum and dead skin cells.

Choice C rationale:

 Skin redness and blistering are not typical symptoms of Acne Vulgaris.

These symptoms may suggest other skin conditions or reactions to topical products but are not characteristic of acne.

Choice D rationale:

 Hair loss and thinning are not commonly associated with Acne Vulgaris.

Hair loss is more often related to conditions such as alopecia or hormonal imbalances, rather than acne.