Ncert Exercises & Solutions

Which of the following are the reason(s) for rheumatoid arthritis? Choose the correct option.

I.	Lymphocytes become more active
II.	Body attacks self cells
III.	More antibodies are produced in the body
IV.	The ability to differentiate pathogens or foreign molecules from self-cells is lost

1. I and II
2. II and IV
3. III and IV
4. I and III