An auto-immune disease is

Options

A. (a) SCID
B. (b) rheumatoid arthritis
C. (c) myasthenia gravis
D. (d) all of the above

Answer

D

Explanation

If the immune system falls to recognise 'self' from 'non-self' and starts destroying the body's own cells, this leasds in some malfunctions, which are termed as auto-immune disease. Both rheumatoid arhritis and myasthenia gravis are autoimmune diseases. In rheumatoid arhritis, inflammation of the synovial membrane in synovial joints occurs. When this membrane, which is the cource of synovial fluid. becomes inflamed, it produces too much fluid. Thus, the joints swell and become extemely painful. Myasthenia gravis gravis is a chronic disease marked by abnormal fatigability and weakness of selcted muscles. The degree of fatigue is so extreme that these muscles are temporaily paralysed.