Which of the following is not true of eukaryotic cell
option A is correct. Birds are called uricotelic as they excrete nitrogenous waste materials by turning it into uric acid.
option B is incorrect. Insects are uricoteluc not ureotelic(excrete waste in form of urea).
option c is correct Tadpole is ammonotelic as it excretes ammonia.
option D is correct. Elephant are mammals and mammals are ureotelic.
Hence, the correct option for this question is obtion B.