Filarial worms in humans live in the.........

Explain the disease Elephantiasis.

Assertion $A$: In elephantiasis, body parts like legs, arms, and genital organs swell significantly.
Reason $R$: In chronic cases, filarial worms block the lymphatic vessels.
Which option is correct for Assertion $A$ and Reason $R$?

In the following table, identify the correct matching of the crop, its disease, and the corresponding pathogen:
Crop - Disease - Pathogen

Which pathogen is responsible for the disease shown below?

Swelling of the limbs, breasts, etc., due to the blockage of lymphatic vessels is a symptom of: