Which of the following produces pre-malignant lesions -
Ans is 'c' i.e. Lichen planus "Oral LP, particularly the erosive (ulcerative variant) is prone to develop SCC, the frequency being 0.8%. Long standing disease and concurrent use of tobacco are the risk factors for malignant transformation. Tongue is the most common site for malignancy, followed by buccal mucosa." - IADVL text book of dermatology 3rd/e p. 1074
Psoriasis
Erythema multiforme
Lichen planus
All of the above
Photosensitive Disorders