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
Klebsiella oxytoca is: 
Select and explain. 
A. Gram variable, B. Indole positive, C. Methyl red negative, D. No drug resistance reported
B: Indole positive
Answer: B: Indole positive 
Explanation: Ans. is 'b' i.e., Indole positiveIt is Indole positive whereas all other klebsiella are indole negative but methyl red and voges Proskauer positive.