Q1. Elephantiasis is caused by:
A Tapeworms
B Flatworms
C Filarial worms Correct
D Ascaris
Explanation
Elephantiasis, or lymphatic filariasis, is caused by filarial worms such as Wuchereria bancrofti, which damage lymph vessels and lead to long-term swelling, especially in the limbs. Tapeworms mainly cause intestinal infections and nutritional problems, not lymphatic blockage. Flatworms are a broad group that includes many parasites, but they are not the specific cause asked here. Ascaris is a roundworm responsible for ascariasis of the intestine, so it does not explain the characteristic swelling of elephantiasis.