A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: B
Solution :
Excretory fluid of Pila contains mostly ammonia and some ammonium compounds, urea and uric acid. Pila shows an adaptation for water conservation during terrestrial phases by converting ammonia into the insoluble uric acid. During aquatic phase, Pila excretes ammonia (as it requires maximum water availability), but during terrestrial phase (due to the deficiency of water), it excretes uric acid. So it is both ammonotelic as well as uricitelic.
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