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: Dental
Which organism is increased in pregnant ladies 
Select and explain. 
A. Porphyromonas intermedius, B. Porphyromonas gingivalis, C. Porphyromonas melaninogenicus, D. Eichenella corrodens
A: Porphyromonas intermedius
Answer: A: Porphyromonas intermedius 
Explanation: None