Answer:
( D ) All of the above .
Explanation:
Urine Formation -
Kidney contains nephrons , whoes main function is excrete out unwanted substance from body , in the form of urine.
Urine formation involves three major process i.e. , Glomerular filtration , Tubular reabsorption and Tubular secretion.
Glomerular filtration -
It is the filtration process in which blood is filtered and the nitrogenous waste and water moves inside the glomerulus.
Tubular reabsorption -
In this process, the molecules and ions gets reabsorbed into the circulatory system.
Tubular secretion -
The secretion process in which , substances like hydrogen ions , creatinine and drugs are removed from the blood and collected in the duct.
And the end product of this is the Urine.
