Arthritis is:.a. a bacterial infection transmitted by ticks. b. an inflammation of any joint. c. a metabolic disorder caused by increased uric acid in blood. d. a condition that may involve an autoimmune disease. e. the most common type of arthritis.

an inflammation of any joint

Explanation:

Arthritis is the swelling and tenderness of one or more of your joints. The main symptoms of arthritis are joint pain and stiffness, which typically worsen with age. The most common types of arthritis are osteoarthritis and rheumatoid arthritis.

Very painful and chronic!

If you wanna know the latin breakdown of the term its

1st Root Word: arthr/o  (which means joint)

Suffix: -itis  ( means inflammation)

Which is why it is inflammation of joints