This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
[{'content': 'True about fungal corneal ulcer - \nSelect and explain. \nA. Symptoms are severe, B. Dry looking ulcer, C. Irregular,zigzag linear branching, D. Shifting hypopyon', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fungal corneal ulcer is dry looking,greyish white with elevated rolled out margins,sterile immune ring may be present,big hypopyon,corneal vascularisation is conspicuosly absent in purr mycotic ulcer.Reference:Comprehensive ophthalmology,AK Khurana,6th edition,page no.106', 'role': 'assistant'}]