Read the passage and answer the following question.
The graph illustrates the data from an experiment in which antibody levels for two different antigens, A and B were measured following exposure to these antigens. Antibodies play a crucial role in the human body's defence against disease.
The secondary response is how many times larger than the primary response?
![484230.PNG](https://search-static.byjusweb.com/question-images/toppr_invalid/questions/484230.PNG)