This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': "Which of the following instrument is NOT used in intracapsular extraction of lens \nSelect and explain. \nA. Cryo, B. Elschning's forceps, C. Phaco-emulsifire, D. Van-graefe's cataract knife", 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Phaco-emulsifier Phacoemulsifier which emulsifies lens nucleus & coical matter by ultrasonic vibration (1 mm titanium needle vibrating 40,000 times/second) is used in phacoemulsification method of ECCE not in ICCE.', 'role': 'assistant'}]