This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
Which of these is not associated with Loeffler's syndrome? 
Select and explain. 
A. Toxocara, B. Strongyloides stercoralis, C. Ascaris, D. Giardiasis
D: Giardiasis
Answer: D: Giardiasis 
Explanation: Loeffler's syndrome causes are as follows: * Ascaris * Ancylostoma sp. * Toxocara sp. * Strongyloides stercoralis * W bancrqfti or W malayi * Trichomoniasis * Clonorchiasis * Visceral larva migrans, etc. Ref - Harrison's internal medicine 20e pg403, 1552, 1553t, 1975, 1975t