Rheumatoid arthritis is caused when . . .
(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 Choose the correct answer from the options given below:
(a) i and ii
(b) iii and iv
(c) i and iii
(d) ii and iv
