This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adverse Drug Effect, Subject name: Pharmacology
Most serious adverse effect of penicillin is:(1994) 
Select and explain. 
A. Skin rashes, B. Jarish Hexheimer reaction, C. Anaphylaxis, D. Convulsion
C: Anaphylaxis
Answer: C: Anaphylaxis 
Explanation: cRef: KDT, 5th ed, p. 656, 657 & 4th ed, p. 704, 705