Which of the following is not a part of the excretory system of frogs?

Which of the following is not a part of the excretory system of frogs?
A. Kidneys
B. Ureters
C. Vasa efferentia
D. Cloaca

Answer:
C. Vasa efferentia

Explanation:
The elimination of nitrogenous wastes is carried out by a well-developed excretory system. The excretory system consists of a pair of kidneys, ureters, cloaca and urinary bladder.