A: Urea is a less toxic excretory substance comparatively to uric acid.
R: Birds and insect are uricetolic animals.
(a) If both the ‘A’ and ‘R’ true and ‘R’ is a correct explaination of ’A’
(b) If both the ‘A’ and ‘R’ true and ‘R’ isnot a correct explaination of ’A’
(C) If A is true the R is false
(D) If A is false the R is true
