This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypersensitivity, Subject name: Pathology
Which of the following is involved in the pathogenesis of myasthenia gravis? 
Select and explain. 
A. Mutation in ryanodine receptors, B. Autoantibodies against acetylcholine receptors, C. Autoantibodies against synaptobrevin, D. Autoantibodies against presynaptic calcium channels
B: Autoantibodies against acetylcholine receptors
Answer: B: Autoantibodies against acetylcholine receptors 
Explanation: Pathogenesis of myasthenia gravis Autoimmune disorder Muscle weakness Formation of auto-antibodies against acetylcholine receptors. - Post synaptic defect