The correct option is
C Ammonotelic
Ammonotelic are the organisms which excrete nitrogenous wastes in the form of ammonia while ureotelic animals excrete nitrogenous wastes in the form of urea.since tadpole is an amphibian it is an ammonotelic animal. T
adpoles are aquatic animals. therefore there is no problem of water conservation for them.hence they can easily eliminate the excess ammonia from their body.Ammonia is more toxic than urea and needs lots of water to excrete from the body.
So the correct answer is 'Ammonotelic.'