This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Lichenoid reactions are mainly due to: 
Select and explain. 
A. Intake of certain drugs, B. Betel nut chewing, C. Cigarette smoking, D. Intake of alcohol
A: Intake of certain drugs
Answer: A: Intake of certain drugs 
Explanation: Lichenoid reactions are drug induced and exhibit histopathological features similar to lichen planus. The common drugs implicated in oral Lichenoid reactions are — antihypertensives, NSAIDS, pencillamine followed by dapsone, ketocanazole, streptomycin, sulfamethoxazole, tetracycline, chloroquine, and oral hypoglycemic agents, etc.
Drug induced lichenoid reactions may resolve promptly when the offending drug is eliminated. Disease exhibiting lichenoid reactions include lichen pLanus, erythema multiformae, secondary syphilis and lupus erythematosus