The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 1-year-old boy is brought to the clinic by his parents for a regular check-up. His weight, height, and head size were found to be in the lower percentile ranges on standard growth curves. His hair is tangled and has a dry, brittle texture. Genetic testing reveals that the patient has a connective tissue disorder caused by impaired copper absorption and transport. The patient’s disorder is caused by a mutation in which of the following genes?   (A) ATP7A   (B) COL5A1   (C) FBN1   (D) ATP7B
['(A) ATP7A <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) ATP7A \n (B) COL5A1 \n (C) FBN1 \n (D) ATP7B <> possible answers', '  A 1-year-old boy is brought to the clinic by his parents for a regular check-up. His weight, height, and head size were found to be in the lower percentile ranges on standard growth curves. His hair is tangled and has a dry, brittle texture. Genetic testing reveals that the patient has a connective tissue disorder caused by impaired copper absorption and transport. The patient’s disorder is caused by a mutation in which of the following genes? <> context@']