This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Medusahead appearance on agar plates is characteristic of 
Select and explain. 
A. Hemophilus, B. Pneumococcus, C. Bacillus, D. Yersinia
C: Bacillus
Answer: C: Bacillus 
Explanation: When grown on blood agar plates, Bacillus anthracis produce nonhemolytic grey to white, tenacious colonies with a rough texture and a ground-glass appearance. Comma-shaped outgrowths (Medusa head, "curled hair") may project from the colony.Jawetz 27e pg: 180