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: Microbiology
Actinomycetoma is caused by- 
Select and explain. 
A. Actinomyces, B. Nocardias, C. Streptomyces, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Actinomyces; 'b' i.e., Nocardia; 'c' i.e., Streptomyces