Deficiency of which vitamin leads to cheilosis, angular stomatitis, and corneal vascularization due to impaired maintenance of mucous membranes?
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Correct answer: Vitamin B2 (riboflavin)
Riboflavin (vitamin B2) deficiency affects carbohydrate and protein metabolism and mucous-membrane integrity, leading to cheilosis, angular stomatitis, and corneal vascularization.
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