True statement about Widal test in typhoid is?: (A) 0-antigen titre remains positive for several months & reaction to it is rapid, (B) H-antigen titre remains positive for several months & reaction to it is rapid, (C) Both remain positive for several months & reaction to both is rapid, (D) None
Answer is B. Ans. is 'b' i.e., H-antigen titre remains positive for several months and reaction to it is rapid