Which one of the following is not an excretory organ?

Which one of the following is not an excretory organ?

مندرجہ ذیل میں سے کون سا ایک قابل اعضاء نہیں ہے؟
Explanation
KidneyExcretory organ (removes nitrogenous wastes like urea).
LungsExcretory organ (remove CO₂ and water vapor).
LiverExcretory organ (breaks down toxins, excretes bile pigments).
Adrenal glandNot an excretory organ, it produces hormones like adrenaline and cortisol.