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: Social & Preventive Medicine
Which of the following is not an extra ocular manifestation of vitamin A deficiency: 
Select and explain. 
A. Anorexia, B. Growth retardation, C. Follicular hyperkeratosis, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Extra ocular manifestations of vitamin A deficiency include anorexia, growth retardation and follicular hyperkeratosis. Ref: Park 22nd edition, page 570