Which one of the following is NOT an excretory organ?

Which among the following organ plays a role in digestion as well as in excretion?

The lungs are considered as excretory organs because of their ability to eliminate

Fill in the blanks appropriately

Organ                          Excretory wastes 

a. Kidneys            ______________________ 

b. Lungs               ______________________

c. Liver                 ______________________

d. Skin                 ______________________
 

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Which one of the following is correctly matched pair of the given secretion and its primary role in human physiology: