This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
Antibody found in patients of myaesthenia gravis is directed against 
Select and explain. 
A. Acetycholine, B. Acetycholine receptors, C. Acetycholine vesicles in nerve terminal, D. Actin-myosin complex of the muscle
B: Acetycholine receptors
Answer: B: Acetycholine receptors 
Explanation: *myasthenia gravis is an autoimmune disease,most commonly caused by antibodies to acetylcholine receptors in the post junctional membrane of the neuromuscular junction ,which are found in around 80%of affected patients. Ref Harrison20th edition pg 2378