This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
[{'content': "Muscae volitantes are seen in - \nSelect and explain. \nA. Vitreous detachment, B. Vitreous hemorrhage, C. Remains of primitive hyaloid vasculature, D. Eale's disease", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Muscae volitantes: These are physiological opacities and represent the residues of primitive hyaloid vasculature. Patient perceives them as fine dots and filaments, which often drift in and out of the visual field, against a bright background (e.g., clear blue sky). Ref:comprehensive ophthalmology AK Khurana page no 245 REF IMG', 'role': 'assistant'}]