This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Large antigen-antibody complexes are formed in - 
Select and explain. 
A. Prozone, B. Postzone, C. Zoneof equivalence, D. Noneof the above
C: Zoneof equivalence
Answer: C: Zoneof equivalence 
Explanation: Ans. is 'c' i.e., Zone of equivalence o Maximum lattice formation (antigen-antibody complex formation) occurs in zone of equivalence.