Assertion (A) In filariasis, the lower legs and scrotum are swelled unproportionate level.
Reason (R) The filarial worm blocks the lymph vessels and lymph node.

A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true, but R is not the correct explanation of A

C. A is true, but R is false

D. A is false, but R is true

Answer: Option A