The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Thumb sucking is normal during:   (A) The first year of life.   (B) First 2 years of life.   (C) First 3 years of life.   (D) First 4 years of life.
['(B) First 2 years of life. <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) The first year of life. \n (B) First 2 years of life. \n (C) First 3 years of life. \n (D) First 4 years of life. <> possible answers', '  Thumb sucking is normal during: <> context@']