This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': 'Equatorial diameter of the lens is \nSelect and explain. \nA. 7mm, B. 8mm, C. 9mm, D. 10mm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The lens continues to grow throughout life. At bih, it measures about 6.4 mm equatorially and 3.5 mm anteroposteriorly and weighs approximately 90 mg. The adult lens typically measures 9 mm equatorially and 5 mm anteroposteriorly and weighs approximately 255 mg. Ref. AAO Sec.11 (2011-2012) Pg.No. 7', 'role': 'assistant'}]