This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Pediatrics
A child is hepatitis B immunized the marker for seroconversion is 
Select and explain. 
A. HBs Ag, B. Anti HBc IgM, C. Anti HBs Ag, D. Anti HBc IgG
C: Anti HBs Ag
Answer: C: Anti HBs Ag 
Explanation: i.e. (Anti HBs Ag): (193- Ghai 7th)Common sero pattern of hepatitis B infectionHBsAgAnti HBsAnti HBcHBeAgAnti HBeInterpretation+-IgM+-Acute infection--IgM+/-+/-Acute infection anti HBC window+-IgG+/--Chronic infection; high infectivity+-IgG-+Chronic infection; low infectivity+-+ /---Precore/ Cor mutant infection-+IgG-+/-Recovery from infection-+ --Immunization; false positive; infection in remote past