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
Which of the following is a rapid growth medium for Klebs-Loeffler Bacillus? 
Select and explain. 
A. Cysteine-tellurite blood agar, B. Loeffler’s serum slope, C. Nutrient broth, D. None of these
B: Loeffler’s serum slope
Answer: B: Loeffler’s serum slope 
Explanation: Klebs-Loeﬄer Bacillus is another name of Corynebacterium diphtheria.
→ Enrichment is necessary.
→ Selective media: Cysteine-Tellurite blood agar or Tinsdale medium.
→ For rapid growth: Loeﬄer's serum slope (also for TB).
→ Special stain to see granules - Albert's, Neisser's and Ponder's. Granules are also called as Polar bodies since arranged in poles.