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
All are features of rosacea keratitis except 
Select and explain. 
A. Corneal vascularisation, B. Central superficial ulcer, C. Chronic blepharoconjunctivitis, D. Progresses to involve the whole cornea
B: Central superficial ulcer
Answer: B: Central superficial ulcer 
Explanation: ROSACEA KERATITIS Corneal ulceration is seen in about 10 percent cases of acne rosacea, which is primarily a disease of the sebaceous glands of the skin. Clinical features : 1. The condition typically occurs in elderly women in the form of facial eruptions presenting as butterfly configuration, predominantly involving the malar and nasal area of face. 2. Ocular lesions: include chronic blepharoconjunctivitis and keratitis. Rosacea keratitis occurs as yellowish white marginal infiltrates, and small ulcers that progressively advance across the cornea and almost always become heavily vascularised. Ref:- A K KHURANA; pg num:-108