Correct Option: B  [ Lymphatics ]
Remark:
Explanation: The adult filarial worm, Wuchereria bancrofti (and Brugia malayi), lives in the lymphatic vessels and lymph nodes of humans. These worms block the lymphatic system, causing a condition known as lymphatic filariasis or elephantiasis, characterized by severe swelling of legs, arms, or genitals. The disease is transmitted by the bite of infected Culex mosquitoes, which carry t