A) Platyhelminthes
B) Nemathelminthes
C) Annelida
D) Coelenterata
Correct Answer: B
Solution :
Wuchereria bancrofti (the filarial worm) belongs to phylum-Nemathelminthes. It is digenetic-the primary host is human and intermediate host is mosquito (certain species of Culex and Aedes). The accumulation of these worms blocks the lymphatic system resulting inflammation of lymph gland and other pathological conditions. In some cases, the obstruction of lymph vessels may cause a serious disease known as elephantiasis (filariasis) in the legs and arms.
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