What does a crocodile excrete as its nitrogenous waste product?

The excretory product of a spider is:

Order of toxicity among ammonia,urea and uric acid (from lower to higher) is

In humans,the waste products of nucleotide metabolism are excreted as

The yellow colour of normal urine is due to

Which one of the following options gives the correct categorization of six animals according to the type of nitrogenous wastes $(A, B, C)$ they give out?
$A-$ Ammonotelic,$B-$ Ureotelic,$C-$ Uricotelic