This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
String of pearl appearance seen in: 
Select and explain. 
A. Clostridium, B. Bacillus anthracis, C. Pneumococcus, D. Staph, aureus
C: Pneumococcus
Answer: C: Pneumococcus 
Explanation: Ans. is 'c' i.e., Bacillus anthracisOn penicillin agar-string of pearl appearance is seen and in Gelatin stab culture inverted fir tree appearance is seen.