This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
All are true about given bacteria except: 
Select and explain. 
A. Gram-positive, highly pleomorphic organisms with paicular arrangement., B. Cardiovascular system involvement is early presentation, C. Special stains are Neisser and Ponder's stain, D. It is sensitive to the majority of antibiotics, such as the penicillins, ampicillin, cephalosporins etc.
B: Cardiovascular system involvement is early presentation
Answer: B: Cardiovascular system involvement is early presentation 
Explanation: Above staining shows cuneiform arrangement/ chinese letter pattern of C. diphtheriae. C. diphtheriae- Gram-positive, highly pleomorphic organisms with paicular arrangement. Special stains like Neisser and Ponder's stain are used to demonstrate the metachromatic granules It is sensitive to the majority of antibiotics, such as the penicillins, ampicillin, cephalosporins etc. Upper respiratory system involvement is early presentation Complication: The exotoxin of C. diptheriae is absorbed in the blood which in turn kills hea, kidney, and nerve cells by blocking protein synthesis.