Ans. C. PVPemphigus vulgaris (PV) is a rare and serious (potentially life-threatening) condition that causes painful blisters to develop on the skin and lining of the mouth, nose, throat and genitals.The blisters are fragile and can easily burst open, leaving areas of raw unhealed skin that are very painful and can put you at risk of infection.H&E: Subepidermal bullaeDIF: linear IgG and C3 deposition at the basement membrane zone