The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 24 years old female presented with amenorrhea for 3 months. LH and FSH levels are elevated three times the normal value. What is the next best step?   (A) Urinary HCG level   (B) Check serum estradiol levels   (C) Progesterone challenge test and look for withdrawal bleeding   (D) Ultrasound of abdomen and pelvis
['(B) Check serum estradiol levels <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Urinary HCG level \n (B) Check serum estradiol levels \n (C) Progesterone challenge test and look for withdrawal bleeding \n (D) Ultrasound of abdomen and pelvis <> possible answers', '  A 24 years old female presented with amenorrhea for 3 months. LH and FSH levels are elevated three times the normal value. What is the next best step? <> context@']