Decreased level of oestrogen in the human body leads to:

Which of the following is an autoimmune disorder?

Which disease is associated with joints in humans?

Gout,a painful disorder of joints,is due to:

Which of the following is an incorrect statement about myasthenia gravis?
$(I)$ It is not an autoimmune disorder.
$(II)$ It affects the neuromuscular junction.
$(III)$ It occurs due to low $Ca^{++}$ in body fluid.
$(IV)$ Paralysis of skeletal muscle is a symptom of myasthenia gravis.

Hernia is a condition characterized by: