<prompt> Psoralan A is used in the treatment of ?PemphigusVitiligoPityasis albaIchtyosis  <response>: Ans. is b i.e., Vitiligo o Psoralen and UV-A have synergistic action, therefore they are used in combination as PUVA therapy. o PUVA is used in 1. Psoriasis most impoant and most common use 3. Vitiligo 2. Eczema 4. Cutaneous T-cell lymphoma 