input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Recently two methods, CPAP conventional and bubble CPAP were compared, in the conventional method 90 out of 160 showed extubation failure while 40 out of 160 showed extubation failure in the bubble method. Which test would be the best to compare the statically significance between the rates of extubation in the two tests.?   (A) Paired test   (B) Chi square test   (C) Student test   (D) ANOVA
output: ['(B) Chi square test <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Paired test  (B) Chi square test  (C) Student test  (D) ANOVA <> possible answers', '  Recently two methods, CPAP conventional and bubble CPAP were compared, in the conventional method 90 out of 160 showed extubation failure while 40 out of 160 showed extubation failure in the bubble method. Which test would be the best to compare the statically significance between the rates of extubation in the two tests.? <> context']