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
True about diphtheria is - 
Select and explain. 
A. Cause cranial nerve palsies in 2nd & 3rd week, B. Treatment with erythromycin, C. It is gram negative organism, D. Passive immunization is harmful and should not be tried
B: Treatment with erythromycin
Answer: B: Treatment with erythromycin 
Explanation: Ans. is 'b' i.e., Treatment with erythromycin