This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal infections, Scabies, Pediculosis, Subject name: Dental
Characteristic lesion of scabies is - 
Select and explain. 
A. Burrow, B. Fissure, C. Vesicle, D. Papule
A: Burrow
Answer: A: Burrow 
Explanation: SCABIES:-Caused by Sarcoptes scabiei var hominis.Clinical features:Itching- generalised, worse at night.this is due to delayed type 4 hypersensitivity reaction. Classic lesion: Burrow-Thread like wavy tunnel in stratum corneum.They appear as serpiginous or S shaped greyish,thread like elevations with a vesicle at one end indicating the presence of mite.seen at interdigital web, feet areola,scrotum. Burrows are pathognomic of scabies. iadvl textbook of dermatology page429