<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, gravida 2, para 1, at 24 weeks gestation comes to the physician for a prenatal visit. She reports feeling fatigue and having swollen legs lately. One month ago, she had a low-grade fever, a runny nose, painful joints, and a sore throat that resolved spontaneously. Pregnancy and delivery of her first child were uncomplicated. She does not smoke or drink alcohol. She does not use illicit drugs. Medications include folic acid and a multivitamin. Vital signs are within normal limits. Pelvic examination shows a uterus consistent in size with a 24-week gestation. There is bilateral edema around the ankles. Pelvic ultrasonography shows fluid accumulation within the fetal scalp and signs of pleural effusions bilaterally. Which of the following is the most likely underlying cause of these findings?? A: Herpes simplex virus, B: Parvovirus B19, C: Listeria monocytogenes, D: Rubella virus, E: Toxoplasma gondiin,  <response>: This is a medical question asking about the most likely underlying cause of findings in a pregnant woman, including fatigue, swollen legs, history of flu-like illness, and ultrasound findings of fetal hydrops and pleural effusions. The key findings pointing to the diagnosis are:- History of flu-like illness 1 month ago fever, runny nose, joint pains- Fetal hydrops fluid accumulation in scalp, pleural effusionsThese findings are classic for parvovirus B19 infection. Parvovirus causes a flu-like illness in adults, and can cross the placenta to infect the fetus, leading to severe anemia, heart failure, and hydrops. The other answer choices are less likely:- HSV would not cause this constellation of fetal findings- Listeria would have other maternal symptoms like diarrhea- Rubella is possible but less common than parvovirus - Toxoplasma would not cause these prenatal ultrasound findingsB: Parvovirus B19 