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
True about actinomyces is - 
Select and explain. 
A. Gram +ve, B. Most common site is brain, C. Tetracycline is drug of choice, D. Portal of entry is inhalation
A: Gram +ve
Answer: A: Gram +ve 
Explanation: None