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
Which egg does not float in a saturated solution of saline? 
Select and explain. 
A. Ankylostoma eggs, B. Trichuris eggs, C. Unfertilized eggs of ascaris, D. Fertilized eggs of ascaris
C: Unfertilized eggs of ascaris
Answer: C: Unfertilized eggs of ascaris 
Explanation: None