The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A girl is has white hair. 40% of her classmates are also suffering from the same problem. None of the other people from the same village have white hair. Her brother who is staying with an aunt in the neighbouring village is also normal and does not have white hair. Which of the following explains the probable cause of her white hair?   (A) Environmental   (B) Genetic   (C) Nutritional   (D) Infection
['(A) Environmental <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Environmental \n (B) Genetic \n (C) Nutritional \n (D) Infection <> possible answers', '  A girl is has white hair. 40% of her classmates are also suffering from the same problem. None of the other people from the same village have white hair. Her brother who is staying with an aunt in the neighbouring village is also normal and does not have white hair. Which of the following explains the probable cause of her white hair? <> context@']