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
Loeffler's syndrome occurs in all except - 
Select and explain. 
A. Toxocara, B. Strongyloides, C. Ascaris, D. Giardia
D: Giardia
Answer: D: Giardia 
Explanation: Loeffler's syndrome was originally reported as a benign, acute eosinophilic pneumonia of unknown cause characterized by migrating pulmonary infiltrates and minimal clinical manifestations.
It may be secondary to parasites or drugs.
Parasite causing Loeffler's syndrome:

- Ascaris
- Toxocara
- Ancylostoma duodenale
- Nectar americans
- Paragonimus westermani
- Strongyloides stercoralis
- Echinococcus granulosus