The following are multiple choice questions (with answers) about medical knowledge.   **Question:** When would you do trans-vaginal sonography in post-menopausal bleeding if endometrial thickness is?   (A) 5mm   (B) 7mm   (C) 4mm   (D) 9mm
['(A) 5mm <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 5mm \n (B) 7mm \n (C) 4mm \n (D) 9mm <> possible answers', '  When would you do trans-vaginal sonography in post-menopausal bleeding if endometrial thickness is? <> context@']