<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An 8-year-old boy presents to the physician with complaints that he is persistently experiencing sickness and clumsiness with multiple episodes of pneumonia and diarrhea. He also says that he has trouble seeing things well in the dark. Other symptoms include white patches keratinized epithelium on the sclerotic coat protection and covering of the eyeball and conjunctival dryness. Can you suggest the cause of these symptoms in this particular child?? A: Vitamin B1 deficiency, B: Spinocerebellar ataxia SCA type 1, C: Autoimmune neutropenia, D: Deficiency of vitamin A, E: Congenital rubella,  <response>: This question describes a young boy with multiple symptoms including sickness, clumsiness, pneumonia, diarrhea, night blindness, white patches on the eyes, and dry eyes. The key symptoms that point to the diagnosis are night blindness, white patches on the eyes, and dry eyes, which are classic symptoms of vitamin A deficiency. Vitamin A is essential for good vision, especially in low light conditions. Deficiency can cause xerophthalmia dry eyes, Bitots spots white patches, and night blindness. The other answer choices do not explain the eye symptoms.D: Deficiency of vitamin A 