<prompt> A young male presented with scaly truncal lesions. OE genital lesions along with oral lace-like lesions are seen. The most likely diagnosis is:Lichen planusPsoriasisSecondary syphilisBehcets disease  <response>: In oral lichen planus, the characteristic lesions are white striae or papules forming a reticular lace like pattern on the buccal mucosa or lateral margins of the tongue, often with a bilaterally symmetrical distribution. Ref: Principles and Practice of Geriatric Medicine edited by M.S. John Pathy, Alan J. Sinclair, John E. Morley, 2006, Page 265 