The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Magenta tongue and cracks at corner of mouth are seen in deficiency of:   (A) Vitamin B1   (B) Niacin   (C) Riboflavin   (D) Pantothenic acid
['(C) Riboflavin <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Vitamin B1 \n (B) Niacin \n (C) Riboflavin \n (D) Pantothenic acid <> possible answers', '  Magenta tongue and cracks at corner of mouth are seen in deficiency of: <> context@']