This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
Advantages of amoxicillin over ampicillin are all except- 
Select and explain. 
A. Better bioavailability & faster action, B. Spectrum includes H. influenzae & Shigella, C. Incidence of diarrhea is lower, D. Food does not interfere with its absorption
B: Spectrum includes H. influenzae & Shigella
Answer: B: Spectrum includes H. influenzae & Shigella 
Explanation: Ans. is 'b' i.e., Spectrum includes H. influenzae & Shigellao Amoxicillin is a close congener of ampicillin; similar to it in all respects except:Oral absorption is better; food does not interfere with absorption; higher and more sustained blood levels are produced.Incidence of diarrhea is lower.It is less active against Shigella and H. influenzae.o It is now preferred over ampicillin for bronchitis, urinary infections, SABE and gonorrhoea.