This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
A 30 year old woman with a bad obstetric history presents with fever. The blood culture from the patient grows gram-positive small to medium coccobacilli that are pleomorphic, occurring in short chains. Direct wet from the culture shows tumbling motility. The most likely organism is - 
Select and explain. 
A. Listera monocytogenes, B. Corynebacterium sp., C. Enterococcus sp., D. Erysipelothrix rhusiopathiae
A: Listera monocytogenes
Answer: A: Listera monocytogenes 
Explanation: Listeria in pregnancy can lead to abortion.
Febrile woman with a bad obstetric history presents with gram-positive coccobacilli and tumbling motility is suggestive of Listeria monocytogenes.