This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Scabies and other infestations, Subject name: Dental
Chiclero's ulcer caused by:- 
Select and explain. 
A. Leishmania Mexicana, B. Lesihmania braziliense, C. Leishmania aethiopica, D. Leishmania donovani
A: Leishmania Mexicana
Answer: A: Leishmania Mexicana 
Explanation: Chiclero ulcer ( gum tree harvestor's ulcer) seen in leishmania Mexicana (New world) Leishmania C/B Cutaneous Mucocutaneous Visceral New world- L. Maxicana- chiclero ulcers (Gum tree harvestor's ulcer) Old world- L. Major- Delhi boils ulcers with central crusting Skin mucosa involved mutilation present: ESPUNDIA L. Donovani (PKDL) - Nodule (face) Hypopigmented (trunk) Past H/o fever Nerve thickening absent Endemic -Bihar