The following are multiple choice questions (with answers) about medical knowledge.   **Question:** When length of a spring is doubled, the effect is:   (A) Doubled   (B) Four times   (C) Six times   (D) Eight times
['(D) Eight times <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Doubled \n (B) Four times \n (C) Six times \n (D) Eight times <> possible answers', '  When length of a spring is doubled, the effect is: <> context@']