This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycology, Subject name: Microbiology
[{'content': 'Black coloured hard nodules In hair is produced by: \nSelect and explain. \nA. Peidra hortae, B. Epidermophyton floecosum, C. Hortae wernickii, D. Malassezia furfur', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a) Peidra hortae Ref: Text book of Microbiology Ananthanarayana8lh editionAll are superficial mycosesPeidra - fungal infection of hair with appearance of firm, irregular nodules along hairshaftBlack piedra- Peidra hortaeWhite piedra - Trichosporon beigelli.Dermatophy tes - infect superficial keratinized tissueTrichophyton - infects skin,hair & nailMicrosporum- hair & skinEpidermophyton - nail & skinMalassezia furfur - by yeast like lipophilic fungus Pityrosporum orbiculare. Causes Pityriasis versicolor (involvement of stratum comeum with macular areas of discolouration or depigmentation of skin)Tinea nigra - localized infection of stratum comeum especially palm- black/brown macular lesions byHortae wernickii', 'role': 'assistant'}]