Dental An autoimmune disease is – a) Pemphigus vulgarisb) Psoriasisc) Lichen planusd) Acne vulgaris A abc B bc C acd D bcd 💡 Explanation An autoimmune disease is – a) Pemphigus vulgarisb) Psoriasisc) Lichen planusd) Acne vulgaris ✓ Correct Answer: A. abc