system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Patient presents with intermittent weakness in proximal group of muscles, fatigubility, ptosis. Which of the following is most definite test to detect the abnormality
assistant
The correct answer is  C i.e. Endrophonium test