Q.

Chronic autoimmune disorder affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as        [2021]

1 gout  
2 arthritis  
3 muscular dystrophy  
4 myasthenia gravis  

Ans.

(4) 

Myasthenia gravis is an autoimmune disorder affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle.