<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 25-year-old woman is brought to the emergency department because of a 1-day history of lower abdominal pain and vaginal bleeding. Her last menstrual period was 7 weeks ago. A urine pregnancy test is positive. A pelvic ultrasound shows a normal appearing uterus with an empty intrauterine cavity and a minimal amount of free pelvic fluid. Treatment with a drug is begun. Which of the following is the most likely effect of this drug?? A: Decrease in guanylate, B: Increase in thymidine monophosphate, C: Increase in deoxyuridine monophosphate, D: Decrease in phosphoribosyl pyrophosphate, E: Increase in tetrahydrofolate polyglutamate,  <response>: This is a clinical vignette describing a 25-year-old woman with lower abdominal pain and vaginal bleeding 7 weeks after her last menstrual period. A urine pregnancy test is positive and ultrasound shows an intrauterine pregnancy with empty gestational sac concerning for a nonviable pregnancy or miscarriage. The question asks about the most likely effect of a drug that would be used to treat this condition. Based on the clinical scenario, this is likely describing treatment for a miscarriage, most commonly with misoprostol or mifepristone. These drugs cause uterine contractions to expel pregnancy tissue. The answer choices describe effects on various cellular metabolites and substrates. Choice C, increase in deoxyuridine monophosphate dUMP, is the most likely effect of misoprostol or mifepristone. These drugs inhibit thymidine synthesis, leading to an accumulation of the substrate dUMP.C: Increase in deoxyuridine monophosphate 