The correct option is
C Uric acid
The major excretory product of arthropoda
is
C) Uric acid
Uric acid is the end product of purine
breakdown in most mammals, birds,
terrestrial reptiles and insects. It is
also the major from in which metabolic
nitrogen is excreted except in mammals.
Ammonia is the excretory product
of aquatic animals and requires a large
amount of water for excretion. While
terrestrial animal like birds,reptiles and
insects excrete uric acid to conserve water.