Answer:
Lysosomes.
Step-by-step explanation:
Rheumatoid arthritis may be defined as the auto immune disease in which the body's own immune cells start killing the cells. This disease becomes worsen with the older age.
The deposition of hydrolase enzyme causes pain in joints in case of rheumatoid arthritis. The enzymes is leaked out from the lysosomes. The improper functioning of lysosomes causes the condition of the rheumatoid arthritis.
Thus, the correct answer is lysosomes.