This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology, Subject name: Microbiology
A 8 years old child is preceniting with perianal itching. Perianal scrabbing/swab is showing following bile non-stained eggs. The causative parasite is- 
Select and explain. 
A. Ascaris, B. Strongyloides, C. Enterobius, D. Trichoris
C: Enterobius
Answer: C: Enterobius 
Explanation: Ans. is 'c' i.e., Enterobius* Perianal pruritis with planoconvex bile non-stained eggs are characteristic of enterosius vermicularis.