This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
In Myasthenia gravis, antibodies are present against 
Select and explain. 
A. Muscarinic receptor proteins, B. Nicotinic receptor proteins, C. Protein actin, D. Protein myosin
B: Nicotinic receptor proteins
Answer: B: Nicotinic receptor proteins 
Explanation: Robbins basic pathology 9th edition page no 800,heading=Myasthenia gravis Myasthenia gravis is caused by autoantibodies that block the function of postsynaptic acetyl choline nicotinic receptors at motor end plates, which results in the degradation and depletion of the receptors. ref img :